A while ago I purchased a new unlicensed battery for my PSP2000 from somebody on eBay. I think it might have been a scam, however, as for some reason the battery shuts off randomly within about 45 minutes of gameplay when it still shows that there is about 73% of the battery left. Would this problem be solved if I bought a Sony-licensed battery, or is it a problem with my PSP? It's been a long time since I updated my CFW, as of right now it's 5.00 m33-6, but I don't think that could be the problem.