I charged the battery thru the computer for 3 hours and wnt I intent to pla it back ,,only last long for 2 minutes
If the rechargeable battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced. Rechargeable batteries will fail if stored in a discharged state for long periods.
SOURCE: battery life cut down to 7 hours
The thing is, you recharge it too much. Because when you recharge it even though it still has battery power left, it tries to recharge it as much as if the battery was depleted. So, your battery overheats, therefore allowing you 7 hours instead of 20. And yes, it is possible to switch the battery.
SOURCE: battery goes dead right after charging
By experience I know that problem...some might suggest you to change the charge wire?I don't thing it would help.
try to reset your mp3 player or you might have to dissamble for 10 mins then close it back...
SOURCE: battery won't recharge on my sandisk clip anymore
my c140 mp3 player conect to the computer and then auto re start again & agin
SOURCE: Ipod 30gb battery shuts off in 30 minutes
your issue could be one of 2 things.
Either your battery is becoming old and needs to be replaced or your mainboard is malfunctioning and causing the low battery signal.
If you have your music library backed up in iTunes, I would connect the iPod and restore the firmware. You can accomplish this by pressing the restore button in itunes.
If your battery is more than 2 years old, replace it and see if the problem goes away,
SOURCE: explosion of a lithium ion battery
this is also called reverse charging.
Reverse charging, which damages batteries, is when a rechargeable battery is recharged with its polarity reversed. Reverse charging can occur under a number of circumstances, the two most important being:
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