I have a Panasonic branded battery. Same battery they make for Westco who puts their stickers on, but it's a little cheaper if you get it branded Panasonic.
Bought it in 2003, lived on the bike for two years, rode it around the world. I use the bike seldom these days, but that battery is still in there and it still works ten years later. I'm not complaining.
Nine mile skid on a ten mile ride. Hot as a pistol but cool inside.