I have had my Nokia N810 for probably 2 years now with the original battery but I didn't use it for a while and the battery still seems to last as long as if it was brand-new.

I have put the OS onto my 8GB micro-SD card using that bootloader I forget the name of just know it looks like Microsoft's XP Bootloader.

Anyway, when i use my USB charger or my other Nokia charger everything works like a charm, I have no problems.

Yet the minute I put in the AC-3U or default charger that came with the device I can have totally random reboots of the device and the other day I awoke to the boot menu with TEST written in large green letters.

Why would only the original charger be rebooting the device?