After going through a battery every couple years, I got me a lifetime warranty battery for about $80. Any time I need a new one, just bring it in for a swap.
http://www.cyclegear.com/CycleGear/Parts/Batteries/brand/MEGABOOST/Batteries/p/36686_47076
(I also fixed the charging system with a CompuFire but since some of the batteries died while on long-term float charge [BatteryTender] I figured the life time warranty was a good thing.)
http://www.cyclegear.com/CycleGear/Parts/Batteries/brand/MEGABOOST/Batteries/p/36686_47076
(I also fixed the charging system with a CompuFire but since some of the batteries died while on long-term float charge [BatteryTender] I figured the life time warranty was a good thing.)