the cellphone turns itself off even though there's still a lot of battery!!

Ok, my previous friends, I'm just sorry If what you say is too stupid, Well to be honest I don't even want to share this. however It's my hobby to make something useful, so I recorded it how to deal with the cellphone turning itself off even though the battery is still 90% || creative ideas for tricks, totally dead phone, Totally dead cellphone can't be charged, HP totally dead battery tanem, Totally dead cellphone hit by water, cellphone dies in water, The cellphone is dead, it's dead, cellphone turns off on its own, My cellphone is because the speaker is active, / trikthop .