laptop Dell 1525 not charging battery while Direct Charger runs computer.

[kyosang]

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i am facing having this problem first occasionally then it become permanent. so i have seen a solution to upgrade BIOS but my battery is not charged that required 10% initially charging, and there is also another problem with DELL 1525 Laptop of CONNECTING ALERT, as USB is attached or not Attached a sound gradually runs like ' TUN Tunn' so how i have to deal with the problem, please guide me.

[little-Jacqueline]

How previous is your laptop? The presentation of batteries, particularly if not cared for properly, can degrade fairly promptly. You most likely will have seen, before this happened, that the battery would only charge up to 90% then stop. Then it might only accomplish 80%, 70%, etc. until ultimately it won't hold any charge(situation that you are facing now). That process can take anything from a couple of months to a few years, but is perceptibly worse the older the battery is. If that is what has happened then your only alternative is to buy a innovative battery.