A:AnswerMake sure your camera lens doesn't have a film on it. Common problem on the HTC one due to heat with the protective coating. You can likely clean the lens off and get it back to normal. I had to scratch it off...
A:AnswerYou can use any micro USB charger (5v).
I use various ones and have a 2amp charger from my local office supply store that works great.
HTC has a rapid charger as well, I believe.
Search Amazon.