[Rac4]

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[Rac4]

Hi Everyone,

I was performing a few readings on my EZbook 3 pro battery, because of the frequent battery problem a lot of Jumper buyers seem to get. The power adapter was plugged in, the battery was plugged in and the computer was running. I was taking a voltage reading at the battery connector of the motherboard, I accidently created a short circuit with my multimeter reading sticks and everything shut down. The spark lasted for less than a second but it was enough. I cannot boot my computer anymore, it is dead.

I tried to power it back but no success. When I plug the power adapter, the side red charging led goes on and off repeatedly. Then, when I press power once, nothing happens : black screen. When I press power a second time, the blue led in front of the keyboard light up for a fraction of a second and then turn off. Nothing happens after that.

I own a Jumper EZbook 3 Pro. 6gb of ram. Emmc 64gb. I don’t think I have the V4 since I can’t (and didn’t) play with the BIOS (it is locked).

 

Here’s what I tried so far:

– I disconnected the battery and the power adapter for a whole night, in order to reset the BIOS. It didn’t work.

– I hold the power button for more than 30 seconds, then release it for 5 seconds, then press the power button for another 5 seconds. It does exactly what it did before : when I press power a second time, the blue led in front of the keyboard light up for a second and then turn off.

– I tested the power adapter. It still delivers a 12.20V tension and amps (I was able to light up a bunch of 12V leds (2.5A consumption)).

– I took no chance and tried with a different 12V (3A) power adapter. It didn’t work.

– I took a good look at the motherboard and nothing seems cooked.

– I unsoldered the battery plug from the battery. I created a 8.7V power adapter and soldered it to the battery plug and plugged it in the battery input of the motherboard. It didn’t work.

 

Does anyone have any clue about what I should try to make it works?

 

Many thanks!

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[Rac4]

Cardoso wrote:

@chupa thats what i did. All sorted and working without charger plugged in. I’m charging it now then I’ll do some tests with battery bar and post it here.

Cardoso, have you figured what didn’t work?

Congrats with your new fully functional laptop!

[Rac4]

What is the voltage you get between the white and the black, and between the white and the red?

[Rac4]

Cardoso :

Did you ordered the same battery as euplio?

Use a multimeter to see what voltage runs between the colors. Mesure all the possibilities and send it. Maybe we’ll be able to help!

 

[Rac4]

It is a good idea. I was able to received about 40 usd. There is a Youtube video of the issue that I used, to show them and they did not asked for more.

Otherwise a fast forward video with a timer might be a way to process.

Also, if it shuts down by itself at a high power %, start filming when you get to the correct %.

Another solution might be to wait a couple of days or weeks of usage, the issue will most probably get way worst in a near future if you continue using the computer casually.

[Rac4]

Does charging goes up to 100%?

[Rac4]

I have an EZbook 3 Pro and the battery won’t hold its charge longer than 2 minutes, even when it’s charged at 100%. I bought it in February…

I wondered what is the current status of your EZbook battery, now that it’s months old?

[Rac4]

Many thanks Chupa for this knowledge. This is getting very interesting!

In other words I’d say that the best possible solution could be to remove completly the battery and use, instead, an external battery plugged with the exact same tip the charger is using. Did anybody tried using the computer with the charger plugged in and the inside battery unplugged? What is the result of this?

Or course, this solution would be so much less pratical for everyday usage. But since the ezbook 3 pro isn’t conceived to house its native battery, I guess this is the logical best solution unfortunately…

OR

Another solution could be to remove the native battery and put a more thin one. I guess this looks like the original statment Chupa elaborated.

More thin would also mean a different capacity, which brings me back to a previous question I was having. Does the computer recognize by itself the plugged in battery and automatically establish its capacity or is the capacity pre-stated by the original builder? Who manage the charging of the battery? Windows or the builder?

[Rac4]

Chupa wrote:

Let it fully charge and discharge at least 3 times. You should have a more accurate reading of battery wear and capacity by then. you are running win 10 I assume? please check your device manager and see that not an intel or MS battery driver is missing I do not understand pic IMG_20180530_204214.jpg also your battery is rated 32.4Wh but you battery bar shows 48Wh, that is not correct reported. I can not make it out from the photos which cell is damaged but the one next to the plug looks a bit more non flat from here. Also check your power options and set like mine, critical action is set to hibernate

Chupa mentioned something important a few post earlier : “also your battery is rated 32.4Wh but you battery bar shows 48Wh, that is not correct reported.”

I haven’t opened my laptop yet, since I’m still in conversation with gearbest regarding the warranty (I’m afraid I’d lose my warranty if I open it since they put a sticker on a specific screw), but I bet I have also a 32.4Wh battery inside my current computer. As you see on the picture Batt capacity history, the battery I have was always considered as a 48Wh battery by my computer. Does this charging confusion affect the battery? I’m almost certain about it. I would suppose that each time the battery is charged to 100% means it’s probably overcharging by a few %… Does anybody with more knowledge than I do would like to comment?

Now, if I’m right, we might suppose that a brand new battery (a 32.4Wh) would also be failing within a few months of usage because I also suppose it would be recognize by the laptop as a 48Wh battery… That’s if I right, of course.

As asked by Chupa, here is attached my battery bar infos. The file BattBar_100 shows the battery at full charge with the charger plugged in. The file BattBar_Unplugged shows the frame on a video right before my computer shuts down. Very frustrating to know that the battery lasts only 2 minutes… Wow…

I have a question for you Chupa, I wondered what was the result of the cell replacement? Did you succeed in making the repair work? And if yes, what are the Battery Bar stats since the repair? Thanks for that and your previous posts! Very helpful!

For Greedo77 : it might not be as visible as your computer is but my battery seems to be swollen too. For my part, it’s the left cell that looks faulty… Thanks for the many infos provided!

Now, if anybody would like to record the volts and amps the battery is consuming while on charge (a measurement while the % growing and a measurement when 100% is reached) and while not on charge, I think it could help. I will try to do it when I’ll open the back of the computer.

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[Rac4]

Instead of buying a new charger (a low voltage one), it might be possible to simply add a buck converter (voltage reducer) to the current laptop charger. It says on the battery that its max voltage is 8.7V. So, adjusting the buck converter to send 8.6V might be a safe bet. I’m only supposing, of course.

This could be a good occasion to add a longer wire to the charger (since it’s so short).

I’m still curious about: Will the computer accept a lower voltage charge? Could it helps the battery on long term?

If anybody had any opinion about this, I’d love to read it.

 

Another note about this issue. I’m guessing we mostly have the exact same one.

As said before : when the charger is plugged in and 100% is reached, if I disconnect it the computer will shut down after about 5 minutes. In order to turn it back on, it needs to be plugged in again. When I reach the desktop, the battery level is at about 95%. Which kinda makes sense… I’m thinking that a faulty battery that cannot hold its charge would normally show a very low %, like 10% or less. I wonder if my guess is right? Do you experience the same issue?

[Rac4]

I bought my ezbook 3 back in February. The battery problem started this week. The battery cannot hold its charge more than 5 minutes, even when 100% is reached. (I made no hardware or software modification.) I’m looking for support with gearbest and considering changing the battery with Chupa’s technique.

But, before doing that, I’m wondering… Why would the 7.6v 4800mAh battery be charged by a 12v 3000mA power supply? I mean… Isn’t there where the problem is? Maybe it’s getting overcharge by a way too high voltage and this cause the battery to fail. I always had the impression, even at the few first weeks (when there was no apparent battery problem) that the battery was getting charged up to 100% quite rapidly. I’m thinking and wondering if anybody have an expertise on that? (I’m obvisouly not an expert at all).

I don’t think the power supply is the problem but maybe the inside battery management system is? If so, it could means that the battery change is very temporary before it breaks again… I don’t even know if the battery management system is build by Jumper or is it managed by the OS (which I honestly doubt). Any clues about that?

Thanks for the previous replies, I hope we all find the long-term solution to this problem.

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