YZXStudio 8 Power Bank Review (4x18650)

43 posts / 0 new
Last post

Pages

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland
YZXStudio 8 Power Bank Review (4x18650)

(Click any image to view a larger version)

Sometimes I get excited about flashlights, batteries, power banks and measuring gizmos. But probably never as much as about the newest YZXStudio 8. gen power bank. Here’s some of my impressions.

YZXStudio is famous for its accurate and advanced USB power meters and DC loads. Check out HKJ’s reviews of the 1270 (http://goo.gl/nqNPoL) and 1266 (http://goo.gl/7wmmnT). With logging capabilities they offer comprehensive testing of USB based power supplies and power banks. They are also QuickCharge 2.0 and 3.0 compatible.

A lesser known device is the YZXStudio power bank. Currently in its 8th generation and available in a four and eight battery configuration, it is quite difficult to obtain, since YZXStudio only sells it directly on their Taobao shop (https://world.taobao.com/item/15147936768.htm).

For consumers in Europe and the US, using Taobao and Alipay (Chinese Paypal alternative) has proved to be challenging. After an evening of trying to register, verify and use Alipay I decided to use a Taobao agent to handle the ordering process.

I ordered the 4 battery housing with the electronics and no batteries. My experience with Mistertao.com was positive. They charged $8 for the whole process including ordering and shipping. The package arrived in two weeks after the initial order for a total price of $59.

Please note that ordering the power bank with batteries preinstalled might end up in the authorities returning it due to Li-Ion shipping regulations. When using a shopping agent, you might not get your money back.

I noted in my order that I wanted the English version of the UI but received Chinese. I contacted Franky Tong, who many of you probably know as the awesome dealer of YZXStudio products on ebay (http://stores.ebay.com/99centHobbies). He is currently graciously looking into providing the English firmware, but we shall see. The firmware update process is similar to other YZXStudio products. It is done with a ST-Link programmer which Franky also sells.

But for now the Google Translate app has been beyond helpful when trying to decipher the menus. I have translated them to the best of my abilities later in the review. Still, here’s hoping that Franky starts selling the English version in his shop even if it is impossible to provide the finished product with batteries due to lithium ion shipping restriction nonsense.

For the batteries I chose four Sanyo NCR18650GAs for their high capacity and 3 A charge current, which YZXStudio recommends. 3 amps or 12 amps total for four batteries is the maximum charging current the power bank supports.


When I first received the power bank I verified that it worked with a single cell and a battery holder soldered to the YZXStudio board. It seemed to work fine, but the first power on has to be done with an external power source connected.


After verifying that the power bank worked, the batteries were spot welded parallel together to form a 4P pack. Thanks to http://www.akkula.fi for the spot welding! The pack was then soldered to the plus and minus tabs on the YZXStudio board. Below is the assembly instructions from YZXStudio. They provide the nickel strips and insulation with the product.


If you don’t have access to a spot welding machine (they run about $200 in Aliexpress), construction by soldering is also possible. There’s not much extra room though, so total noobs (like me) shouln’t try it. Here’s one innovative way of doing the 8P pack for the bigger version by soldering http://www.chongdiantou.com/thread-12682-1-1.html


The default boot screen has a retro theme. It is customizable by programming the firmware. A procedure that is not quite straight forward (http://www.chongdiantou.com/thread-10661-1-1.html).


The business end of the power bank is similar to most devices on the market, except for the 5.5×2.5 DC input jack, which is often seen in only the biggest power banks. It supports a wide range of voltages and currents. The micro usb charge port supports QC2.0 and 3.0 for fast charging. The leftmost usb output is QC2.0 and 3.0 compatible as well but also works with normal USB devices. The two buttons are used to navigate menus and a longer press on the right one also turns the power bank off and on even if it’s charging. Long press on the left one activates a setting in the configuration menus.


The other end of the power bank has a capacity label, which might help you board a plane with your bag full of lithium ion cells. The input voltage and current is incorrect, maybe from a previous model.


When there’s a QC2.0/3.0 load attached, the usb output voltage shown is always for that one, not reflecting the voltage of the normal 5 V output. The current meter calculation also takes into account both loads but you cannot do plain addition and substraction when the output voltages are different. In the picture there’s two loads, the left one is 1.5 amps at 5 volts and the right one 1.5 amps at 9 volts (QC2.0). When thinking in terms of power (watts) their combined load equals equals about 2.4 amps at 8.90 as indicated on the screen. 1.5A x 5.14V + 1.5A x 8.9V = 21 W ~= 2.4A x 8.9V.

What makes the YZXStudio powerbank special is its configurability. You can define in every possible way how the battery pack is charged and discharged. The charging can be done from a usb power supply (also QC3.0 compatible) or with a DC power supply from an old laptop for example. The DC input accepts voltages from 4 to 20 volts up to 5 amps. Maximum charging rate of the battery pack is limited to 12 amps.


I tested the power bank with a SkyRC MC3000 power supply which is rated for 15 V at 4 amps. Its 5.5×2.5 mm plug fits right into the DC input. With it I managed to charge the battery pack at 7,5 amps or 1,875 A per cell. With a standard USB charger (Anker 5-port 40 W) the charging only happened at 2,2 A or 0,55 A per cell. I also tried a 12 V 3.33 A laptop charger which managed 6 amps. At the time of testing, I didn’t have a QC3.0 usb power supply to test the charging of the power bank.

So the charging speed is heavily dependent on the power supply and its voltage drop at higher currents. The power bank calculates the maximum charge current when you plug the charger in. The charge current is increased and the power bank monitors the input voltage. From the data it determines the optimal current draw. The YZXStudio also has a setting where you can define how sensitive it is to the voltage drop of the power supply. My testing was done on the default setting of 0.35 volts.

All of this means that I can charge the YZXStudio with 4 3500 mAh cells from empty to full in about 2.5 hours. Compare this to similar capacity power banks which usually take anywhere from 8 to 21 hours. When in a hurry, the high input current can really save the day. And it doesn’t even come close to harming the batteries. A pack of Sanyo NCR18650GAs, LG MJ1s or Samsung 30Qs can take the 2 A charging day in day out. The power bank is also sold with the two latter cells preinstalled. The efficient electronics keep the power bank only luke warm.

The battery charge level indicator is also a very accurate. Instead of relying on the voltage of the battery pack like many other devices, you can input the total mAh capacity of your chosen batteries or go through a discharge-charge cycle to make the learning process automatic. You can repeat this as the cells age to calibrate. Because of the electronics, the power bank can determine how many milliamphours has been input or output and the indicator is pretty much spot on. When charging the device itself, you don’t have to use a separate usb power meter to show when the charge is actually done.

After the capacity calibration procedure, the power bank determined my 4x NCR18650GA pack to be 13312 mAh. The SkyRC MC3000 indicated 13058 mAh when I tested their capacity beforehand at 1 A discharge. The total capacity will of course depend on the charge and discharge currents.

There’s two ways of determining the state of the charge in the battery pack. A clear percentage indicator and an accompanying bar is always on the top of the screen when the display is on. There’s also a screen with an mAh counter which shows both the total capacity and the capacity left in the batteries numerically.

In addition to the high input current for charging, the total output is exceptional. There’s two usb outputs, one 5 volt for normal devices and a 5-12 volt for QC2.0/3.0 compatible devices. The latter is marked by a flash graphic and can also be used with any usb chargeable device.

The 5 volt output is rated at 12 watts, i.e. 2,4 amps, the QC-output at 30 watts or 2.5 A at 12 V, 3.3 A at 9 V. In reality, the output is ridiculous. I measured 4.0 amps from the 5 volt output before the voltage dropped below 4.75 volts. Both ports loaded, the output stayed stable at 5.5 amps (2.5 A + 3.0 A) before I decided that was enough torture and didn’t raise the current anymore. There should be no problems charging even the most power hungry tablets from the power bank.


You can measure the resistance of a micro-usb cable by connecting it between the 5 volt output and micro usb input and entering the last page in the settings menu. No external load needed! The resistance is shown at the bottom right corner (0.216 ohms). A good cable for high current charging is usually short (<30 cm) and has a resistance of under 0.3 ohms to minimize voltage drop. EDIT: this feature seems to be bugged in that it uses 2.0 A load but calculates the resistance as if the test was done at 1.0 A. So it gives you double the true resistance.


When under load, the power bank will estimate the remaining runtime (0 days, 1 hour, 35 minutes) based on the current output of the last 30 seconds. The average current value shown is the current drawn from the battery pack, not to the 5/9/12 volt output.

Comparisons to other power banks

Most power banks fail to provide over 3 amps from their ports combined, much less keeping the output above 4.75 volts. The YZXStudio has no problems with providing a combined 5.5 amps (2.5 A from the 5 V port and 3.0 A from the QC port) at 5.13/4.93 volts. The most impressive thing is that the level of charge in the battery pack has no effect on the output voltage. Output is rock solid whether it is 100 % full or <10 % capacity.

I usually measure my power banks at 1.75 A current, because that’s what my iPhone 6 charges itself at. I also like to rate my power banks by their energy/weight ratio (Wh per kilogram). By this metric the best power bank i have ever tested is the Anker Astro E5 16000 mAh (2nd gen) which provides 50.6 Wh and weighs only 314 grams. This comes out as 161 Wh/kg. In the 2nd place, a little surprisingly, is a Clas Ohlson 6000 mAh (2×18650) power bank with 26 Wh / 170 g = 153 Wh/kg. It was only measured at 1 amp discharge.

The YZXStudio loaded with one of the highest capacity cells available (4x NCR18650GA) clocks in at 44.6 Wh and 321 grams = 139 Wh/kg. Not quite there with the Anker but taking into consideration the smaller size, higher output power, QC2.0/3.0 compatibility and way faster recharging, I think the YZXStudio wins the overall bout hands down. It is also the highest energy density of my 4 cell power banks. The 8 cell version would definitely fair better in the Wh/kg comparison, since the overhead caused by the electronics and metal housing would decrease. More relative weight dedicated to the batteries themselves.

The electronics in the YZXStudio are very sophisticated and efficient. I measured 47.5 Wh (at 1.0 A discharge) from the four bare 18650GA batteries on the SkyRC MC3000 vs. 44.6 Wh inside the power bank. This means that the nominal 3.6 volt boost to 5 volts only turns about 6 % of the energy to heat. This doesn’t even take into consideration the efficiency reduction with the faster discharge rate.


Comparison between four 4×18650 battery banks. The YZXStudio is a clear winner in the energy density category.

Comparison table between those same battery banks.

Efficiency is calculated by dividing the output energy by the measured (if possible) energy in Wh of the cells inside (discharging down to 2.8 volts). For the YZXStudio and the Tomo it was calculated from my own measurements of the exact same NCR18650GA cells with a SkyRC MC3000. For the Huawei it is calculated from the manufacturer’s specification of 46.8 Wh. For the Doca, an assumption of Samsung ICR18650-26H/F/J inside was made. Their energy according to HKJ’s test is about 9.4 Wh per cell at 1 A.

Most well designed power banks with high capacity cells lie in the 120-130 Wh/kg range. These include for example Poweradd Apollo 3 (LiPo, 125 Wh/kg), Anker Powercore 3350 mAh (1×18650, 119 Wh/kg), Huawei AP007 14000 mAh (4×18650, 120 Wh/kg) and Tensai TB-15600 (6x Samsung 18650-26H, 125 Wh/kg). Some of these were measured only at 1.0 amps because they didn’t reach 1.75 A.


Here’s a comparison of the YZXStudio power bank and the popular Miller ML102 both loaded with one NCR18650GA battery. YZXStudio’s output voltage stays solid until the end, while the Miller starts to sag after 45 minutes or 7.9 Wh. Discharge current was the same 1.75 A in both tests.

Overview of the on screen display

Breakdown of all of the settings (range in parentheses)

DISCLAIMER I am not a native Chinese speaker. Even though most of the following settings are self explanatory to battery and flashlight enthusiasts, there might be some misunderstandings. It is better to leave the settings to their default values if you are not sure what they are for.

1.* edit: Output voltage offset for QC2.0/3.0 (-0.39 – +0.5 V)*
2. Sleep current threshold. Under this the powerbank will shut down after a set period, see next setting (0.01-2.55 / off)
3. Sleep timeout in minutes (1-99 min / off)
4. Battery cutoff voltage. When the battery pack voltage falls under this value, the device will not provide any output (2.50-3.49 V, 0.01 V steps)
5. Charge voltage. This is the target voltage for the battery pack (3.584-4.256 V)
6. Charge current. Absolute maximum charge current for the battery pack. Decreases automatically if limited by power supply or settings #8 and #9. (0-12 A, 1 A steps)
7. Charge termination current. CV charging phase ends when current has decreased to this value. (0.0-3.0 A, 0.2 A steps)
8. Power supply input voltage drop threshold. If the power supply charging the power bank has a voltage drop, the power bank will automatically limit charging current. This sets the sensitivity. (0.00-1.00 V, 0,05 V steps)
9. Charging current. You can set it to adjust automatically and the battery bank tests your power supply or choose the current manually. If using several different chargers, including USB and 5.5×2.5 dc, automatic is preferred for optimal speed. (0.256-5.120 A, 0.256 A steps)
10. Screen off timeout. The time in seconds it takes the screen to turn off after user inactivity. (5-80 sec, 5 sec steps)
11. Screen brightness. (0-13)
12. Calibrate sea level atmospheric pressure in hPa. (8000-30000 hPa, 400 hPa steps)
13. Battery pack capacity calibration. (Calibration done, After charge, after discharge or set manually 8000-80000 mAh)
14. Calibration and advanced settings submenu
-1. Calibrate battery voltage
-2. Calibrate battery current
-3. Battery full voltage (0.000-4.977 V, 0.234 V steps)
-4. Charge current when battery full. Starting current when battery voltage at defined max (setting #14-3) (0.00-5.10 A)
-5. Battery empty voltage (0.000-4.977. 0,234 V steps)
-6. Battery empty charge current. Starting current when battery voltage at defined min (setting #14-5) (0.48-20.4 A, 0.08 A steps)
15. Reset settings to factory defaults
16. USB cable resistance measurement. Connect a cable between the micro usb charge port and the 5 V output port and the power bank will calculate the resistance through voltage drop with different currents. No additional load needed!

Edited by: maukka on 08/15/2016 - 14:55
maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland

reserved

sidecross
sidecross's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 10/31/2015 - 18:55
Posts: 711
Location: North America

Thank you!

I wish more Power Banks like this one were available for easy purchase. I enjoy using power banks as much as flashlights, batteries, and chargers.

“You must have a plan, if you don’t have a plan, you will become part of someone else’s plan.” Terence McKenna

will34
will34's picture
Offline
Last seen: 3 hours 43 min ago
Joined: 12/18/2012 - 00:12
Posts: 3171

Wow, great review with lots of data! Thanks for the extensive tests.

Did you measure efficiency by using a YZX meter? My 7th gen with 4x Sanyo GA clocks at 93.5% efficiency at 5V 1A down to 2.5V, using the same YZX dummy load and the green YZX meter. So there is some efficiency increase with this 8th gen…

I have always considered the Tomo DIY powerbank crappy, 66.9% is simply awfully low efficiency for such a low power output.

Enjoy your world’s most advanced, most powerful and most efficient powerbank! Big Smile I’m seriously considering the 8 cells version, but $100 is not easy to shell out.

sidecross
sidecross's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 10/31/2015 - 18:55
Posts: 711
Location: North America

Good engineering which means efficiency usually comes at a price; I would spend $100 but its not worth the hassle to obtain one.

“You must have a plan, if you don’t have a plan, you will become part of someone else’s plan.” Terence McKenna

will34
will34's picture
Offline
Last seen: 3 hours 43 min ago
Joined: 12/18/2012 - 00:12
Posts: 3171
sidecross wrote:
Good engineering which means efficiency usually comes at a price; I would spend $100 but its not worth the hassle to obtain one.

Actually it’s not a hassle at all, you can send a message to Frankie Tong http://stores.ebay.com/99centHobbies, he’s an official distribuitor of YZX products and you can directly paypal him for whatever you need, he buys it from taobao site and ships it to you.

There is another ebay seller called dz-stuido and also sells YZX products and other electronic stuff http://stores.ebay.com/dz-stuido, I spoke with him a couple weeks ago and he gave me a good price on the 8cell version shipping included, however communication with this seller was horrendous and I couldn’t trust him my money.

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland
will34 wrote:
Did you measure efficiency by using a YZX meter? My 7th gen with 4x Sanyo GA clocks at 93.5% efficiency at 5V 1A down to 2.5V, using the same YZX dummy load and the green YZX meter. So there is some efficiency increase with this 8th gen…

Yes, I used the 1270 for the measurement. I only drained the batteries down to 2.8 volts though (on the MC3000 and inside the YZXStudio).

sidecross
sidecross's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 10/31/2015 - 18:55
Posts: 711
Location: North America

will34 wrote:
Actually it’s not a hassle at all, you can send a message to Frankie Tong http://stores.ebay.com/99centHobbies, he’s an official distribuitor of YZX products and you can directly paypal him for whatever you need, he buys it from taobao site and ships it to you.

There is another ebay seller called dz-stuido and also sells YZX products and other electronic stuff http://stores.ebay.com/dz-stuido, I spoke with him a couple weeks ago and he gave me a good price on the 8cell version shipping included, however communication with this seller was horrendous and I couldn’t trust him my money.


Thank you will34

I have had excellent contact and results with Frankie Tong in the past.

“You must have a plan, if you don’t have a plan, you will become part of someone else’s plan.” Terence McKenna

swaan
Offline
Last seen: 1 week 6 days ago
Joined: 08/15/2015 - 03:34
Posts: 44
Location: Estonia

Very cool review maukka!

I have been having an eye on the gen8 as it first appeared in some chinese forums but I am not making a purchase unless I get english menus. I get YZX’s issue – they don’t want to bother with export issues (CE, TÜV.. etc).

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland

Got the English firmware from Franky today. Update went without a hitch. Seems like my translations were correct, but it still looks much cleaner now. The display also dynamically changes now when a charger is plugged in. Before it used to show input voltage and current all the time.

Here’s the programmer plus cables with pogo pins which you keep pressed on the pads on the pcb while doing the update. YZXStudio 1266 power meter in the picture. I updated it first, but it required some troubleshooting since the updater just wouldn’t connect. After resetting the meter to factory settings, things went smoothly.

Idle:

Charging:

Discharging:

sidecross
sidecross's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 10/31/2015 - 18:55
Posts: 711
Location: North America

maukka

Thank you for the update; this is how a power bank should be.

“You must have a plan, if you don’t have a plan, you will become part of someone else’s plan.” Terence McKenna

swaan
Offline
Last seen: 1 week 6 days ago
Joined: 08/15/2015 - 03:34
Posts: 44
Location: Estonia

Oh well, looks like its time to open up my wallet Big Smile

will34
will34's picture
Offline
Last seen: 3 hours 43 min ago
Joined: 12/18/2012 - 00:12
Posts: 3171
swaan wrote:
Oh well, looks like its time to open up my wallet Big Smile

Same here! Big Smile

RaVeN
Offline
Last seen: 3 months 3 weeks ago
Joined: 06/15/2012 - 22:20
Posts: 185
Location: AU

Great review! Looks like a pretty neat powerbank all in all.

Too bad it doesn’t have type-C output (I need that for fast charging my nexus 6p), otherwise I think it ticks all the boxes that the best power banks come with right now. The DC Input is an added bonus, 2 hours charging is insane for a power bank! The lowest I’ve heard of is around 4-5 hours for power banks charged by Quick charge 2.0/3.0.

swaan
Offline
Last seen: 1 week 6 days ago
Joined: 08/15/2015 - 03:34
Posts: 44
Location: Estonia

Whew..finally got mine together!

A word of warning: the installation is super-tight. I had NKON do the welding but the cells weren’t properly in line so I had to remove the cell sleeves in order for them to fit at all! The nickel strips need to be well aligned and correct length too.

Mine is with the new Plus series hardware revison: higher precision current sampling, new QC controller FP6601Q, new soft buttons, QC port now rated for 5A (lower resistance), new ceramic capacitors & inductors. FW is now updatable through USB – you still need STLink though.

More info here: http://www.chongdiantou.com/thread-14260-1-2.html

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland

I also got another today and it’s the new version. But the charging is not working. One of the components has snapped off from the pcb. Kind of a tight spot, but I’ll see if I can fix it with a short piece of wire by first removing it altogether.

will34
will34's picture
Offline
Last seen: 3 hours 43 min ago
Joined: 12/18/2012 - 00:12
Posts: 3171
swaan wrote:
Mine is with the new Plus series hardware revison: higher precision current sampling, new QC controller FP6601Q, new soft buttons, QC port now rated for 5A (lower resistance), new ceramic capacitors & inductors. FW is now updatable through USB – you still need STLink though.

Nice! Mine is on the way too, but I still haven’t found who can do the spot welding for me.

I’ll probably have to ask NKON to do it and ship it to me internationally, how much did he charge you?

.
.

Maukka: I have added this review to the YZXStudio index thread: http://budgetlightforum.com/node/44310

That thread is now the first result when searching for “YZXstudio” on google, at almost 10K views it brings lots of unique visitors to BLF.

swaan
Offline
Last seen: 1 week 6 days ago
Joined: 08/15/2015 - 03:34
Posts: 44
Location: Estonia

will34 wrote:
I’ll probably have to ask NKON to do it and ship it to me internationally, how much did he charge you?

Nkon asked me 10€ for the welding and it took 6 days before my order was shipped. I just wrote them that I was happy with the welding but I had trouble because the pack was not really flat and glued too – maybe now they will do a better one for you Smile
dodge_911
Offline
Last seen: 7 hours 50 sec ago
Joined: 02/18/2016 - 15:07
Posts: 140

will34 wrote:
swaan wrote:
Mine is with the new Plus series hardware revison: higher precision current sampling, new QC controller FP6601Q, new soft buttons, QC port now rated for 5A (lower resistance), new ceramic capacitors & inductors. FW is now updatable through USB – you still need STLink though.

Maukka: I have added this review to the YZXStudio index thread: http://budgetlightforum.com/node/44310

That thread is now the first result when searching for “YZXstudio” on google, at almost 10K views it brings lots of unique visitors to BLF.


I noticed…. It has bumped my older review down a bit Smile
:: youtube ::
http://bit.ly/dodgereviewsyt
:: blog ::
http://bit.ly/dodgereviewstmb
  :: powerbank capacity tests ::
http://bit.ly/drpbcc
:: μusb cable resistance tests ::
http://bit.ly/drmicrousb
:: lightning cable resistance tests ::
http://bit.ly/drlightning
 :: type-C cable resistance tests ::
http://bit.ly/drtypec

 

too
Offline
Last seen: 11 months 1 week ago
Joined: 09/10/2016 - 09:25
Posts: 2
Location: Thailand
swaan wrote:
FW is now updatable through USB – you still need STLink though.

Do you have more info on firmware update?
I just got 2.03 with Chinese and want to update to English version

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland
too wrote:
swaan wrote:
FW is now updatable through USB – you still need STLink though.

Do you have more info on firmware update?
I just got 2.03 with Chinese and want to update to English version

Here’s the software instructions, but the new version can be updated via the micro-usb port. You also need the STLink programmer.

too
Offline
Last seen: 11 months 1 week ago
Joined: 09/10/2016 - 09:25
Posts: 2
Location: Thailand
maukka wrote:
too wrote:
swaan wrote:
FW is now updatable through USB – you still need STLink though.

Do you have more info on firmware update?
I just got 2.03 with Chinese and want to update to English version

Here’s the software instructions, but the new version can be updated via the micro-usb port. You also need the “STLink programmer”:http://www.ebay.com/itm/ST-Link-V2-Compatible-STM8-STM32-Programmer-with....

Thanks. I have V3 version. Where can I get English firmware for it?

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland

maukka wrote:
I also got another today and it’s the new version. But the charging is not working. One of the components has snapped off from the pcb. Kind of a tight spot, but I’ll see if I can fix it with a short piece of wire by first removing it altogether.

http://i.imgur.com/3lXWqgW.jpg

The board works fine now after I soldered a piece of wire to connect the broken off part back to the pcb.

swaan
Offline
Last seen: 1 week 6 days ago
Joined: 08/15/2015 - 03:34
Posts: 44
Location: Estonia

Weird – can’t find resistance measurement anywhere on my Contra SW. There is no setting 16.

maukka
maukka's picture
Offline
Last seen: 15 min 7 sec ago
Joined: 12/31/2015 - 04:15
Posts: 665
Location: Finland
swaan wrote:
Weird – can’t find resistance measurement anywhere on my Contra SW. There is no setting 16.

Cannot check now, but did you make sure it wasn’t moved to the “Datum” calibration submenu in the 2.03 firmware?

swaan
Offline
Last seen: 1 week 6 days ago
Joined: 08/15/2015 - 03:34
Posts: 44
Location: Estonia

Yes, silly me – its under Datum now. Thanks

will34
will34's picture
Offline
Last seen: 3 hours 43 min ago
Joined: 12/18/2012 - 00:12
Posts: 3171

Finally got mine today!

The install was tricky because the battery pack assembled by Nkon wasn’t properly done. The first problem was the batteries weren’t glued on a flat surface same as member swaan experienced, second problem was the battery tabs were off centre and they were shorting with the aluminium casing. With some dremel work and lots of krapton tape to avoid shorting everything was installed correctly.

My UI is in English, version 2.03.Some flaws/differences I noticed vs the unit maukka reviewed:
-LVP limited to 2.70V
-The resistance meter is hidden in the calibration submenu and still displaying double the true resistance, as mentioned above.
-Compass function doesn’t work, barometer over reads even when calibrated.
-Automatic charge current detection doesn’t work as consistently as I’d like, with the same QC2.0 charger it would choose 12V 1.5/1.75/2.0A randomly, but if I set it to manual it will always draw 2A.

It doesn’t seem to draw past 2A at any QC voltage, whereas the older yzxstudio 7 will draw up to 2.4A 12V or until the battery charge current hits the 4.56A limit.

Hopefully all these bugs or flaws can be fixed with future FW updates, but so far I’m happy with the construction and performance.

I was expecting Mario Bros power on logo, but got Contra instead. Not bad I guess?

angerdan
angerdan's picture
Offline
Last seen: 8 hours 10 min ago
Joined: 11/01/2015 - 10:07
Posts: 132

Where did you order?
Which model did you buy?
How long was the shipping time from china to your country?
How much did you pay in $ for the Powerbank/shipping/customs?

will34
will34's picture
Offline
Last seen: 3 hours 43 min ago
Joined: 12/18/2012 - 00:12
Posts: 3171

angerdan wrote:
Where did you order?

From Franky, tong@franky.com

Which model did you buy?

YZXstudio 8P powerbank

How long was the shipping time from china to your country?

15 days from HK to USA (forwarding address to my country)

How much did you pay in $ for the Powerbank/shipping/customs?

$70 shipped including flashing the latest FW in English.

angerdan
angerdan's picture
Offline
Last seen: 8 hours 10 min ago
Joined: 11/01/2015 - 10:07
Posts: 132

Thanks!

Btw, booth of the domains http://franky.com and https://world.taobao.com didn’t work anymore.
Do anybody know more?

sidecross
sidecross's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 10/31/2015 - 18:55
Posts: 711
Location: North America

angerdan wrote:
Thanks!

Btw, booth of the domains http://franky.com and https://world.taobao.com didn’t work anymore.
Do anybody know more?


http://stores.ebay.com/99centhobbies

This is his E bay store.

“You must have a plan, if you don’t have a plan, you will become part of someone else’s plan.” Terence McKenna

Pages