I got two Pismo batteries refilled for $85 each via mail order by a shop in California. I'd recommend saving the money for a new battery, and not bothering with the whole battery refill business. Supposedly this place refills your old battery (4500mAh) with new cells that'd make it 6600mAh. In practice, both of my batteries came back maxed out at ~5400mAh, despite my following their battery exercising instructions religiously. So I can only assume they lied about the 6600mAh cells. Secondly, I learned after the fact that the built-in circuits in the battery will shut down the recharging fucntion after it believes the battery has been recharged more than 300 times (or some other finite number). I believe that's what's at play with one of my two batteries, since it went completely unrechargable after a few months.