YZXStudio 8 Power Bank Review (4x18650)

Me too!
Could be an EU groupbuy maybe.
Perfect would be if someone can solder good cells into the powerbank, since shipping from Hong Kong is prohibited or expensive.
Franky Tongs price for 4/8cell version is $73/$76 per piece including shipping. So groupbuy could be less.

Franky also wrote me:

Creating a new thread for the groupbuy would be a good one too separate the topics.
http://budgetlightforum.com/forum/marketplace/commercial/liaisons

As I said, a groupbuy on this charger and I´m superinterested, seems to be very difficult to import to Europe.

Hello guys.
I just got my powerbank and its just awesome!
I’ve soldered inside 4*3500 Sanyo cells and it shows 13.400mAh capacity. By the way it was pretty hard to put inside even not soldered cells - enclosure was too tiny. And after I solder it with usual 80w soldedrer it wasalmosy impossible to put it inside with pcb, but I did it wit a some cell tube scratching. I think its not a problem that “-” will be on case.

Language of interface was not a problem to understand what is what, but I prefer English one. Tell me please where I can get firmware? Franky’s store don’t work anymore. My current firmware is 8t-2.11-0916.

And one more question: How I can enter menu with calibrations? Long press for any but to just power off bank :\

Thank you for help.
Regards, Sergii.

Long press the rightmost button on the last information screen to enter settings and calibrate the battery capacity.

Thank you maukka, now I got it. Also I discovered that I have 7more submenu points in 16th menu. And main menu order not as yours.

Tell me please where I can ask for eng firmware?

Hello, where can i purchase this powerbank

I got it from here taobao | 淘寶

Woooooooo! There is English language inside!

To enable open menu by long press right button on the screen with version
Scroll down with right button to 16th point
Long press right button
Choose 25th menu point
Long press right button
Choose “En” by right button
Long press right button
PROFIT!

That’s cool! Before you had to get hold of the English firmware and flash it.

Yeah. That’s why I bought stm programmer, but looks it’s useless now.

Sorry guys. My store was closed for about a week as I was very busy packing stuff up at home to prepare for my move overseas. The store is now open again. Unfortunately I will not be carrying any YZXstudio products anymore. I made a post on the EEVBlog forum a while ago explaining the reason: Starting a new chapter - Page 1

—Franky

The concept is exciting, but the batteries are put in parallel, or without ORing MOSFET control, the weaker battery will kill the others. The iPad batteries are connected via ORing MOSFET control, which is the “secret” for battery longevity.

How can I buy this power bank?

https://item.taobao.com/item.htm?spm=a230r.1.14.117.d0fa2880UCL3OM&id=564706369813&ns=1&abbucket=5#detail
https://item.taobao.com/item.htm?spm=a230r.1.14.172.d0fa2880UCL3OM&id=520229554757&ns=1&abbucket=5#detail

Thanks!

Is it normal that I can’t find any XYZStudio products in BuyInCoins?

Is it also normal that I can’t login in even if I registered?

Finally, how I actually use a Taobao agent? Sorry, first time done it.

Bump. Sorry.

I don’t know BuyInCoins, so can’t say if anything is normal.
Why not just buy from taobao?

Because for some reason, my credit card company blocks Taobao transaction every time, and the hassle of having to go and physically approve the transaction is too much in my opinion.

I have some questions regarding this very interesting power bank (thanks for the nice intro & review!):

  1. Is version 8 still the newest variant? The review is from 2016
  2. If not, what are the differences btween it and the newer verison(s)?
  3. What is the standby current when the display is turned off and the device is lying around unplugged?
  4. If I reduce the charge voltage of the batteries and increase the minimum voltage to prolong their lifespan (for example min = 3.5V, max = 3.9V), does the percentage display react accordingly?
  5. What happens to the percentage display of the remaining capacity when a fast-charging device is plugged in and the voltage of the batteries drops?

To me the most interesting details about this power bank are that one can set the min & max battery voltages to increase the lifespan and that high-drain batteries can be used. They work much better in cold temperatures wallowing the power bank to truly be always ready.