Why is my battery draining so fast

A

AC Question

I have a Samsung j1 and it was originally on 100% then I left it in my lap not turning it on then when I turned it on it was at 75% then I left it on my lap then 5 minutes later I turned it on it was on 1%. When I was charging it, it was originally on 25% then 10 minutes later it was on 100%. Is there a solution to stop the battery jumping?
 

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