I purchased a Mugen for my n810 back in April, and the battery wouldn't hold a charge. They sent me a replacement in May and that one wouldn't charge at all. They offered to send me another replacement, but I've almost spent as much on postage as I have on the battery.

I'm just trying to replace my original BP-4L. If it's not going to be a genuine Nokia battery (and I can't find a way to purchase a genuine Nokia battery from Nokia anymore), Mugen was looking good, but I'm not sure what my options are now. I'd have preferred them over some random ebay/Amazon sellers as I've gotten burned purchasing a "new" battery that turns out to be a loose, used battery that barely holds a charge.

I may try Mugen one more time though... maybe 3rd time's the charm?