The battery is weird even after replacing cells with new ones Aspire e5-573G.

Randall2004

Hello, I don't know what is going on with my laptop, I have Aspire e5-573G. It all started something like half a year ago, when the laptop were on battery, it started discharging quickly, something about 30 minutes of life but I thought it is normal because the laptop was pretty old, almost 7 years. Then i found out that the battery is going only somewhere to 50% and then suddenly dies and when I start laptop back there is 5% of battery. I thought that it is only a bad cell so I've bought new 4 18650 batteries with capacity 3000mah. originally there was sanyo 16650 with designed capacity of 2200mah. While I was replacing the cells, I've checked the old ones but no one of them was like "dead", all of them had something about 4.1 volts. After replacing the cells, Iven get them back to laptop and turned on.. And here comes the fun thing, the batteries I've precharged before putting into laptop, I've then tried cycle the batteries but first thing is the the laptop dies sometimes when on 70% sometimes on 50% or even 30%, I've even tried push the button on bottom of laptop to reset battery and by some videos I've found I connected battery positive terminal with positive output cable on smb for a few seconds but nothing worked. The i found out another thing and that is, if my math is good the batteries should be fully charged on 16.8V (4.2V * 4) together but the laptop is trying always to put there around 17-17.2V which is a bit high I think. And last thing, a was looking for voltage all the time, after unplugging laptop for a while it was fine but then somehow the voltage started dropping quickly to around 13V and then laptop died. I've quickly plugged laptop back, turned laptop on and when I looked on the voltage, there was 16.65V in batteries, I don't think it is possible to after like 30seconds while was laptop turning on there can be the voltage back at that high value... I would be happy if anyone would know what to do. I personally think there is a problem with smb or something other that controls battery but i am not sure

. Also sorry for that long question but a had to write all details so you can better imagine my situation

Have a nice day

(Thread was edited to add model name to the title)

Image: https://us.v-cdn.net/6029997/uploads/editor/xz/476f04joeaxl.png

Accepted answers

JackE

>>>the old original batteries were doing the same thing as now with new ones. At least I am trying to find out why is this happening:) have a nice day >>>

It is happening because the battery's old internal controller is still the same old internal controller. The controller has been irreversibly set to protect the old or new cells from fire or explosion hazard. You cannot reset or replace the controller. You need to install a new battery with a new internal controller to avoid the fire or explosion risk!!! it is not worth the fire or explosion risk to try to save $40.

All comments

JackE

Sorry, the battery pack has its own internal charge controller that is designed for the original cell capacity to avoid fires and/or explosions. Accordingly, it will not charge properly the way the pack was modified. Google search 'e5-573G' 'battery' for vendors who ship to your location. Less than about $40usd.

Image: https://us.v-cdn.net/6029997/uploads/editor/ov/ss0aodxkkons.jpg

Randall2004

Okay i understand that the controller doesn't support any other batteries than original, but what I don't understand is why it does the same problem (I mean that laptop dies somewhere on 50% charge) with the original batteries even when the cells are good and why does it overcharge them to 4.3V each cell.

AnhEZ28

@Randall2004 maybe you might need to find a way to reset the battery capacity controller so that it reverts to back original cells capacity. Like resetting the BMS for example.

Randall2004

@AnhEZ28 I've tried the reset battery button on the bottom of the laptop and I found video of shortening out the positive of the battery and positive output on BMS which should reset it but it didn't worked. But I'm still researching if I could find something different. Have a nice day

JackE

Unless or until you understand Li-ion cell chemistry and how to design they're internal charge controller in a battery pack to avoid fires or explosions --- even with the proper capacity cells --- I suggest that you replace the battery pack ASAP if you intend to use this laptop.

Randall2004

@AnhEZ28 I've tried the reset battery button on the bottom of the laptop and I found video of shortening out the positive of the battery and positive output on BMS which should reset it but it didn't worked. But I'm still researching if I could find something different. Have a nice day

Randall2004

@JackE you are right, I was trying to fix my problem as soon as possible and maybe as cheapest as i can, unfortunately I couldn't fix it yet, I personally think there is something with the protection board because as I said, the old original batteries were doing the same thing as now with new ones. At least I am trying to find out why is this happening:) have a nice day

JackE

>>>the old original batteries were doing the same thing as now with new ones. At least I am trying to find out why is this happening:) have a nice day >>>

It is happening because the battery's old internal controller is still the same old internal controller. The controller has been irreversibly set to protect the old or new cells from fire or explosion hazard. You cannot reset or replace the controller. You need to install a new battery with a new internal controller to avoid the fire or explosion risk!!! it is not worth the fire or explosion risk to try to save $40.

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