Instruct: Classify the given review into positive or negative sentiment.
Query: Works as a dvd player, but not as a portable

The player is very durable physically, which was a pro for me, but I discovered alot of downsides that outweigh the good. For starters, the picture was o.k. most of the time, but when viewing dark-lighted movies (ex. scene at night) you couldn't see anything at all-the screen is naturally dark and you can't change its brightness levels. Two, you can fastfoward, etc. but you have to be careful doing so-if you press the skip button instead of holding it, you just skip to the next scene. Worst of all, though, is that the battery dies permenently very quickly...after charging and watching it about 5-10 times, the battery refuses to be recharged, and now I can only use the player when its hooked up to the adapter-which defeats the purpose of it being a portable player(and I do not want to shell out over $100 for a new battery; I doubt most be people do). More for the last reason than anything else, I suggest against buying this product.