Replacement lithium-iron-phosphate (LiFePO4) battery for the Ranger electric bike kit. Or an extra battery for very long rides. Range of 25+ miles. Built from certified Dakota Lithium cells. LiFePO4 is heavier and bulkier than the lithium ion cells used in our other batteries but provides a longer lifespan. This battery lasts 2,000 recharge cycles, about 3 times the lifespan of other lithium and e-bike batteries. A good choice for customers who use their 36 Volt bike frequently and want a battery that will last a long, long time. Or if you are looking for the best lifetime value (and don’t care about the weight).