The battery of my phone was dead so I took out the battery and put it back on6rom there the red light started beeping and my phone doesn't switch on I tried charging it but still all it does is beep the red light but never switch it on... What's the problem and how can I fix it?
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Put the battery where - back on6rom?????

Which Bold do you have? There are several models, starting with the 9000 series, so please update your profile to show the model number, not the name.

Perhaps the battery is damaged. Running a Lithium battery below 20% on a regular basis can damage it.

One other option, before replacing the battery is to plug into a working wall outlet and let the device charge for an hour or so. then with it still on and plugged in, remove the battery for 30-60 seconds, then replace it and see if the device will boot.