Help me psp is broken

So i was on a holiday yeh and i was charging my psp using a car charger yeh the psp was on and i was playing with the charger in it whilst the car was of. when the car turned on my psp turned off. when i turned it back on i checked my battery and it was almost empty from what happened. so i charged my psp back up but it wont hold charge proply it will just be normal like on 70% then 5 mins later 20% plz help i need my psp fixed.

Probably its the battery's problem. U should get it checked and if possible , repair or get a new one . :D