"Warning battery low" but recharges when turned off without power cord attached..

[AC Question]

Samsung Galaxy PRO 10.1.....
While using after a time the "warning battery low" indicator comes on and says anything from 10-20% left....by the time ive done a little more it might be down to 5-10% and i switch it off...when i turn it back on in the morning it can be anything from 50-70% charged..yesterday was such a morning re-start and it was back to 65% and i used it till it again showed "warning battery low"..turned it off and 4 hours later back on last night and it was 45%.... from a full 100% charge i probably get an hour if i'm playing games such as wgt golf app or other power hungry games or you tube video's... the Tablet is just over 2 years old but has been doing this for at least a year..i have had one of them covers on with magnets in which i have also taken off today as perhaps some cause ?
Appreciate any help.
Keith

 

[B. Diddy]

Welcome to Android Central! Try recalibrating the battery sensor software by charging up to 100%, then using it normally until it shuts off automatically from low battery. Then charge back up to 100%, and see if the issue persists.

 

[keithhazel]

Thanks for taking the time to answer, i did charge it up today to full although i did not start it up to see what it had in it after 3 low battery warning in a row without needing to charge it to have it boot up again,from 100 charge it only lasted 40 minutes playing on line games so i will do it properly tomorrow and do exactly as you suggest and we will see how that goes, i shall do it for a few days before i report back.
thanks again

 

[B. Diddy]

If the calibration doesn't work, then the battery might be starting to fail. Make sure your important data is backed up somewhere, in case the device suddenly stops working.