So I just got me an EZ-Flash IV for my GBM, and have it all set up and working, but I have a question regarding the battery. From the research I have done, it is suggested to charge it for 6-8 hours in a Gameboy/DS that's powered on and plugged in, while at the same time, it might not even have a rechargeable battery. What should I do? How do I know if it's rechargeable or not, besides the packaging? Is there any good way to open up the case without breaking it? It already is loose on one corner. And if it's not rechargeable, how long does the battery last before I need to replace it? Thanks.