Eizfan Lux S4 LCD Touch Screen Smart Charger, Analyzer - my favorite UI in a charger

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tatasal
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Eizfan Lux S4 LCD Touch Screen Smart Charger, Analyzer - my favorite UI in a charger

I had this Eizfan S4 Touch Screen charger/analyzer for several months already, but never found the time to put it to test. Now here it is, from a BLF member, not HKJ mind you!

Edit: More photos in post # 12

Currently available here: NEALGADGETS (use discount code: efans4 )



At the back is the input port for the cables with probes for Internal Resistance (IR) test:

Video on IR test measurement: ( tested are Samsung 18650-30Q and and a used Samsung 21700-48G)

Charging, Discharging, etc.:

Nice touch in its UI:
Take note I chose ‘Discharge’ mode the 21700 in bay two. The bargraph changed color, then it starts to move right to left, as opposed to left to right when charging.

Specifications:

*Touch Sreen Intelligent Charger

*MAX.CC 2 Amps

*Battery Charging & Discharge testing & Capacity Grading & Battery Resistance Testing
*Built in cooling fan with two temperature sensors

*Compatible with
IMR/3.7V Li-ion/3.8V Li-ion/LiFePO4/1.2V Ni-MH/Ni-Cd
32670 26670 26650 22650 21700 20700 18650, 18490, 17500, 18350, 14500, 10440, 16340(RCR123)
Ni-MH / Ni-Cd
AA AAA AAAA SC C D etc

Adjustable 4 (0.5A*4/1A*4/1.5A*4/2A*4) optional charging modes for different capacity battery.

Features:

1.Micro-programmed control unit, intelligent implementation of touch control, four slots operate independently and support the hybrid charging mode.
2.Using constant current, constant voltage charging mode.
3.Using DV control technology to reach higher charging efficiency.
4.Color LCD display screen instantly shows charging progress, battery voltage,current, time,capacity,charge-discharge curve and display diagram of internal resistance testing.
5.Compatible with Ni-MH /Ni-Cd/ LiFePO4/ Li-ion 3.7v/Li-ion 3.8v battery for any capacity.
6.Fit in rechargeable cylindrical battery which diameter below 32mm,height 34-73mm.
7.AC 100V – 240V DC turn into 12V input mode (or DC 12V 5A vehicle-mounted input)
8.Functionality includes charging, discharging, capacity grading & battery resistance testing
9.All the discharge current is set to 0.5A.
10.Protection of opposite connection: corresponding battery slot showing “Battery Error” if battery reversed.
11.Protection of short circuit: corresponding battery slot showing “Battery Error” if battery short circuit.
12.Automatic activation function: automatically activate the “zero voltage” lithium battery.
13.Intelligent temperature control: built-in cooling fan will be according to the two temperature sensors, to detect machine internal temperature which rise to 60 degrees Celsius automatically open, drop to 40 degrees Celsius automatically stop, ensure the charger has good working condition. Avoid spontaneous combustion or ignition in high-capacity batteries during high temperature on the charge and discharge process.

Edited by: tatasal on 09/09/2019 - 22:48
mrheosuper
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strange, the IR probe uses 4 wire i assume, but the tip is only 1 wire, that will make the measure wrong

Forgot my pen

HKJ
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I did look at it, but it is some time ago: http://budgetlightforum.com/node/61831

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

tatasal
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I have several chargers, ranging from first few ones that I got when I joined this hobby: iCharger 106B hobby charger, the Pila IBC and the Powerex Maha C9000.

Then came the Nitecores, the Xtars and my first analyzing charger with 4 bays, the Opus BT-C3100 V2.0/2.1, 2.2.

Then the new kids on the block that can cater to long cells and high amperage/auto current charging like my Miboxer C4-12 and their other models, all the way to the C8.

I also have the SkyRC MC3000, which I regretted to this day due to its complexity to use relative to simplicity of my other analyzing charger/analyzers.

This Eizfan S4 is a breeze to use, has very clear color LCD screen that you just tap to choose what you want, whether you want to charge, choose current, discharge on the next cradle while doing other sorts of modes in a combination of different cell chemistry (lilo, lipo4, nimh), all simultaneously, just like the Opus but without the Large color LCD Touch Screen that the Opus lacks.

No more memorizing of procedures, etc. or making a list or cheat sheets like the SkyRC.

Of course its price is quite a bit on the high side at $119 (with code)…but I tell you, once you actually get to use this thing hands-on, you’ll wonder why they only came up with this design now.

It’s just like using your smart phone by tapping on the screen, but without connecting it via cumbersome Bluetooth, data cable, etc.

Trail Trek
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Love this UI, the one thing i dislike about my Nitecore SC4 and UMS4 is the 2 button approach to the UI
This is much more intuitive to me. Shame about the price but very interesting, thanks for the post and info.

Nev
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What voltage are the cells when measured straight after it says full(preferably using a fluke mm)?

fluke
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Can not for the life of me find it on Nealsgadgets.

shirnask
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fluke wrote:

Can not for the life of me find it on Nealsgadgets.

Here

fluke
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Thank You.

cayman
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wow, what a complex, nice and huge charger. I am astonished how many features it has, and what a nice display.

Nev
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Nev wrote:
What voltage are the cells when measured straight after it says full(preferably using a fluke mm)?

I’m not sure if no response is telling me it falls short of 4.2volts.
tatasal
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Nev wrote:
Nev wrote:
What voltage are the cells when measured straight after it says full(preferably using a fluke mm)?
I’m not sure if no response is telling me it falls short of 4.2volts.

At the moment, I am testing/charging one partially discharged 30Q. (Actually, my first time to fully charge a cell, so I don’t know how it terminates!)
Here are the initial photos:
Tapped the #1 bargraph, then this screen appears to choose charging rate. I tapped 2a, it’s highlighted, albeit poorly!

When “type” is tapped, screen will show the auto detection of cell chemistry, in this case the 30Q is Li-ion 3.7 ( the Li-ion 3.8 is for some special cells that terminates at 4.35v)

Screen showing starting point:

At 1 minute elapsed time, 2a rate:

34 minutes later:

After 40 min:

After 56 min:

100% after 1hr., 4.20v

4.20v @ 100%, (graph not shown)

Nev
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Ok thanks ,I like the touchy screen ,but what’s important to me is accuracy & consistency.

tatasal
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Nev wrote:
Ok thanks ,I like the touchy screen ,but what’s important to me is accuracy & consistency.

You have the photographic answer in my post # 12.

Nev
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Thanks very much for taking the time to show this Thumbs Up
But I was more interested in confirming that the actual battery voltage is accurate by using an accurate multimeter to see if the chargers idea of 4.2volts is really 4.2 volts.

In other words is the charger calibrated properly.

tatasal
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Nev wrote:
Thanks very much for taking the time to show this Thumbs Up
But I was more interested in confirming that the actual battery voltage is accurate by using an accurate multimeter to see if the chargers idea of 4.2volts is really 4.2 volts.

In other words is the charger calibrated properly.

While most modern, well-designed chargers of today terminate @ 4.20v, almost all batteries, if not all, almost immediately go to their ‘natural’ resting voltage of below 4.20v anyway, for me, I have no practical purpose of checking about exact voltages to the thousandths of a volt.

Sarah Efan
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Hello friend, for more exact datas, pls kindly check the HKJ review of Eizfan S4: http://budgetlightforum.com/node/61831

Sarah Efan

Yi Fang TECHNOLOGY CO.,LTD
Efan(Eizfan) li ion/IMR battery & charger, Around 10 years professional manufacturer

Email: sales55@efanbattery.com
Web: www.yifangpower.com
Alibaba: https://yi-fang.en.alibaba.com
www.efantech.en.alibaba.com
Skype: efan.sales5
Facebook: Sarah Efan
Wechat: efantech4

Nev
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Sarah Efan wrote:
Hello friend, for more exact datas, pls kindly check the HKJ review of Eizfan S4: http://budgetlightforum.com/node/61831

I’m not sure if this post is aimed at me ,I think it may be so I’ll reply,
I’ve read HKJ’s review , he’s very good & I highly rate him,
But I’m not sure if he has time to verify each test with a multimeter because he’s very busy with the amount of stuff he tests , so I’m sure he’s talking the termination volts from the chargers display, I have bought & use charges he’s tested & ive bought because he said this or that charger terminates at 4.2v but when I’ve tested them they usually fall a bit short eg 4.16 ,4.17 etc , or maybe if he has got time to verify that it terminates at a real 4.2 then it’s possible manufacturers may cherry pick before sending to him because their credibility is on the line. Shocked
Sinical old me..
BlueSwordM
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Most chargers do terminate at 4,20V.

However, for the cell to stay at 4,20V, it needs to be overcharged a little, or termination current needs to be lower.

There’s almost no measurable capacity difference between 4,13V-4,20V if the cell charges correctly.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Nev
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BlueSwordM wrote:
Most chargers do terminate at 4,20V.

However, for the cell to stay at 4,20V, it needs to be overcharged a little, or termination current needs to be lower.

There’s almost no measurable capacity difference between 4,13V-4,20V if the cell charges correctly.


Yes I agree with you BUT I’m not talking about a cell staying at 4.2 v ,it is obviously going to settle to around 4.18 after a while , I’m actually talking about cells leaving the charger STRAIGHT after the charger says full @4.2.
If it’s actually terminating at 4.17 v verified with accurate multimeter but charger reports 4.2
Then the cell will settle at something like 4.14-4.15v ,I hope that’s made it clearer to understand.
HKJ
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Nev wrote:
Sarah Efan wrote:
Hello friend, for more exact datas, pls kindly check the HKJ review of Eizfan S4: http://budgetlightforum.com/node/61831
I’m not sure if this post is aimed at me ,I think it may be so I’ll reply, I’ve read HKJ’s review , he’s very good & I highly rate him, But I’m not sure if he has time to verify each test with a multimeter because he’s very busy with the amount of stuff he tests , so I’m sure he’s talking the termination volts from the chargers display, I have bought & use charges he’s tested & ive bought because he said this or that charger terminates at 4.2v but when I’ve tested them they usually fall a bit short eg 4.16 ,4.17 etc , or maybe if he has got time to verify that it terminates at a real 4.2 then it’s possible manufacturers may cherry pick before sending to him because their credibility is on the line. Shocked Sinical old me..

My curves are made with a 6½ digit multimeter and I read the termination volt from them (From the curve, not from the logfile).
Termination voltage is highest voltage while current is on, as you can see on all my curves voltage drops immediately when current is turned off.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Nev
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I’ve stoped using the all88 charger with lithium ion because if I check the voltage a day after charging the voltage is 4.13 -4.16 (the gyrfalcon isn’t consistent on all slots) but if I charge on mc3000 they read about 4.18 v a day or so after charge ( I set termination to 4.2v )
Hey HKJ ,Do these manufactures know you are going to publish your tests on forums
Is there a chance these are cherry picked for reviewers ?
Do you actually get mainstream production units ? I’ve noticed you sometimes don’t get the retail boxes
Maybe it’s the luck of the draw & some chargers of the same type are accurate & some not so!
Well anyway I’m very happy with my two mc3000’s ,my opus (after modifying) &my xtar vc4 they all terminate at a verified 4.2 ,the rest stay in their boxes.

HKJ
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Nev wrote:
Hey HKJ ,Do these manufactures know you are going to publish your tests on forums

When I say the charger is supplied by the charger manufacturer, like the Xtar, Eizfan, Golis chargers. When I buy the chargers or they are supplied from a shop the manufacturer will not know it.

Nev wrote:
Is there a chance these are cherry picked for reviewers ? Do you actually get mainstream production units ? I’ve noticed you sometimes don’t get the retail boxes Maybe it’s the luck of the draw & some chargers of the same type are accurate & some not so!

Mostly no, I do sometimes get defective chargers for review.
Missing retail boxed is either early production units, from Ebay or from a reader.
The charge voltage will vary for copy to copy of a charger, how much depends on the quality of the parts used and if they do calibration.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Nev
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HKJ wrote:
Nev wrote:
Hey HKJ ,Do these manufactures know you are going to publish your tests on forums

When I say the charger is supplied by the charger manufacturer, like the Xtar, Eizfan, Golis chargers. When I buy the chargers or they are supplied from a shop the manufacturer will not know it.

Nev wrote:
Is there a chance these are cherry picked for reviewers ? Do you actually get mainstream production units ? I’ve noticed you sometimes don’t get the retail boxes Maybe it’s the luck of the draw & some chargers of the same type are accurate & some not so!

Mostly no, I do sometimes get defective chargers for review.
Missing retail boxed is either early production units, from Ebay or from a reader.
The charge voltage will vary for copy to copy of a charger, how much depends on the quality of the parts used and if they do calibration.


Thanks HKJ that’s what I suspected Thumbs Up
Mishanchik
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It seems to me that everything is very simple. If you want the voltage on the cell to be as close to 4.2 V as possible, choose a charger that is as low as possible with a cut off current and, as a result, a longer charging process.

For example:
MiBoxer C4-12 – cut off 60mA. 18650 taken out of the charger – 4.195V.

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Mishanchik wrote:
It seems to me that everything is very simple. If you want the voltage on the cell to be as close to 4.2 V as possible, choose a charger that is as low as possible with a cut off current and, as a result, a longer charging process.

For example:
MiBoxer C4-12 – cut off 60mA. 18650 taken out of the charger – 4.195V.

I think the C4-12 sometimes shows 0.06A and sometimes 0.05A (to verify) end-charge current before it indicates “Full”.
And you’re right, when I use a DMM to test the battery voltage (right after it becomes “Full”), then the battery voltage is really really close to 4.20v (oftentimes just +/- 0.005v from 4.20v, so like 4.195-4.205v)