[nikkibee521]

ive had issues with my phones doing the same thing. the car charger boosts to charge faster, just like with charging from the computer, but it may not be giving an accuate reading, and may not keep a charge as long. In essence, I was told to keep the phone on the charger for an extra twenty minutes or so to ensure that it really is fully charged. it's best to use the wall charger and not always having it plugged in.