I ordered a new battery from Jimmy at BGA, a 15AH SilverFish battery with Panasonic cells. He built me one with Boston Power 'Swing' cells, which he assures me have a longer cycle life and it has more capacity. See fuzzy photo attached. This is the second battery I have bought from this firm. I looked at other firms, who seemed cheaper BUT, some came without a charger, and no obvious info about a warranty. Some had only six months for a warranty. I stuck with Jimmy, and got human service, really good delivery and a year warranty, clearly stated on his site. Also, a charger. A very good firm. My old battery, which is bottom-feed, I took apart, and re-routed the cables to the output socket at the top. I now have a spare battery which is good for about 20 miles.