Fix Your Stuff Community Store

Repair information for the Asus Transformer series.

119 Questions View all

Options

Asus R554LA. Revive battery that was unused for a few years.

Asus batteries have this flaw that if a battery is unused for a few months, it completely dies and can't be charged. This apparently has to do with a "safety system" in the battery's controller.

The battery in question was brand new, installed by Asus. But the laptop was unused for a prolonged time. Is there a way to revive it? I even opened the area where the controller is. Can anyone please help?

Block Image

Update (03/22/24)

Thanks. How many volts should the power source be. Where can I get a power source. Can I apply directly to the internal power pads of the battery? The voltage for the first three pins is 12.5, the next two are 3.3

Block Image

Answer this question I have this problem too

Is this a good question?

Yes No
Score 0
Add a comment

1 Answer

Filter by:
Most Helpful Newest Oldest

Options

@garegin that is actually not a flaw but a safety feature. Your battery “locks” its charging circuit once it has discharged below its threshold. There is a way to “wake” the battery up. You can’t charge it through the regular charging circuit but you can apply a power source directly to the batteries positive and negative connector.

Measure the voltage on your battery connector before doing that. Then briefly connect a power source to the positive and negative connector. You must observe proper polarity. Now briefly apply power to the battery. Short intervals only since you do not want your battery to experience a thermal failure with flame. A minute or two might just be enough. Measure the voltage on the battery again. Once it is above the initial threshold it will unlock and should charge again.

Some batteries are easier than others. The most complicated once require special equipment to be unlocked. Give it a careful try and see what happens. Use common sense and always be cautious when working with batteries.

Mise à jour (03/24/24)

check the board :-)

Block Image

Once you have the battery out, take a picture of the other side as well. I think there must be a fuse somewhere

Was this answer helpful?

Yes No
Score 0

3 Comments:

Just updated the question.

by

@garegin what voltage do you have on P+ and P-? It's a 3.75V battery not sure where the 12V comes in. Unplug the battery from the motherboard and measure on the control board. If it is 3.3 V it actually should still charge. The threshold should be around 2.9V but it looks like there are two batteries. Remove the one you have there. I just have a feeling you are looking at 2 separate batteries that are connected in parallel.

by

Where should I measure on the control board? P+ and P-?

by

Add a comment

Add your answer

garegin will be eternally grateful.
View Statistics:

Past 24 Hours: 1

Past 7 Days: 3

Past 30 Days: 5

All Time: 42