The correct battery for a 255 is 12v, 7ah. The 12ah unit is for use in the battery supply used with the reference motor. The best source for a replacement is Rage Battery: http://www.ragebattery.com
Select a PowerSonic model PS-1270 with 0.187 faston tabs (12v 7AH) or equivalent. The current price is $11.
Chris
Select a PowerSonic model PS-1270 with 0.187 faston tabs (12v 7AH) or equivalent. The current price is $11.
Chris