I've recently started saves with my M3 Lite and I suspect that the battery is going bad. I tried some searches, but can't find any info about the exact specs of battery in the M3 Lite. So I opened it up and the metal contacts are over the writing on the battery and I prefer to simply keep the battery in place until I have a new one on hand and I'm ready to make the switch. So does anyone here know what I need to buy? Thanks!