Kindle Fire has satisfactory battery life. It can play videos up to 7.5 hours. The battery life is quite good in 7-inch model. When we have a long journey, Kindle Fire is suitable to take along.
However, a friend of mine, who just received Kindle Fire, told me something like this. “my kindle fire only can play mp4 videos, when i drag some other videos into it, it can’t do nothing…”, Then, i searched information about kindle fire supported video formats. Only mp4, vp8. In other words, common MKV, VOB, TIVO, WMV, AVI, MTS, MOV, FLV… videos can’t be played on Kindle Fire. It’s really a pity.