How can I recover my battery backup?

[AC Question]

I recently used a car charger to charge my blackberry priv and it seems to have done some damage to my battery life. The battery dies randomly even when it has 50% - 60% charge on it. Is there a way through which I can restore the battery's performance?

 

[belodion]

Is there a sudden vertical drop in the battery usage graph? If so, the battery may need to be replaced.
https://forums.androidcentral.com/showthread.php?t=409154