Laptop Battery Showing 0% After Months Of Storage

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Estimable
May 30, 2014
1
0
4,510
Hello

I'm currently in a situation and hope I can recieve some assistance. My ASUS X555 laptop has been in storage for the last couple of months and hasn't been used. I've heard conflicting reports about how I should discharge the battery and remove it, whilst other users have suggested that the battery will discharge itself automatically. I remember discharging it and leaving it within the laptop.

Whatever the reason might be, I'm unable to power the laptop on without plugging it into the main power. The battery light is showing as orange and It needs to be plugged in throughout use. The laptop is essentially brand new, with very little usage and wear.

Can you help me with this predicament and advice me on how to restore the battery to it's normal functionality?

Thanks for any advice and help.
 
Solution
If it measures 0v then the protection circuit is tripped. Li-ion packs disconnect at 2.5v/cell because any lower could cause a fire when you charge it back up, but this is a low enough discharge to cause permanent damage to the cells. If the pack can't be reset by charging with the laptop off, then it is likely dead.

Li-ion cycle life is reduced by both overcharging and overdischarging. You can't do anything about the overcharging as that's determined by the charging circuit, which is usually designed to maximize runtime over battery life--particularly in phones where it's usually set for an astonishingly high 4.3v/cell (which results in a cycle life of only 150 charges until permanent 30% loss of capacity). But you could...
If it works with the charger cord, and not with the battery, are you sure the battery is even charging?

Try charging it when it is on, and off, and see if either works. If it works only when the laptop is off, the charger is a likely culprit. If it doesn't charge either way, then the battery is the problem.

Also, new or not, try to remember that depending on where it was stored, it could have caused the battery to not work. High temps, or lows, can really mess with a battery.

You can try pulling the battery and then reconnecting it. It could also just be a loose/misaligned connection.
 

BFG-9000

Respectable
Sep 17, 2016
167
0
2,010
If it measures 0v then the protection circuit is tripped. Li-ion packs disconnect at 2.5v/cell because any lower could cause a fire when you charge it back up, but this is a low enough discharge to cause permanent damage to the cells. If the pack can't be reset by charging with the laptop off, then it is likely dead.

Li-ion cycle life is reduced by both overcharging and overdischarging. You can't do anything about the overcharging as that's determined by the charging circuit, which is usually designed to maximize runtime over battery life--particularly in phones where it's usually set for an astonishingly high 4.3v/cell (which results in a cycle life of only 150 charges until permanent 30% loss of capacity). But you could certainly extend battery life by not overdischarging.

Li-ion is considered worn out at 70% capacity but usually ages gracefully as even 50% capacity is still pretty useful in a laptop, where half the runtime is still something. Compare that to other types of rechargeable batteries that simply drop dead at end-of-life. But it is perfectly possible to kill a Li-ion with abuse.
 
Solution