Why does my battery drop from 50 to 2?

[AC Question]

Why does my battery drop from 50% to 2%

Hi my galaxy tab s battery keeps draining. It will be fine then drop from say 60% to 2% in minutes. If I turn it off then on again the battery goes straight back up to 50-60%. Does anyone know what's happening
Thanks
Danny

 

[Daniel Grice]

Re: Why does my battery drop from 50% to 2%