Lithium Batteries have a significantly longer life span than mature lead-acid and nickel-based batteries. In the condition of this electrical bike business, it's more probable that a limited lithium ion battery life span isn't because of a brief cycle life, but is rather caused by a complete battery failure due to poor quality control in the production procedure. So, most importantly, make sure that you're purchasing a E-bike Battery that is equipped with a high quality 。
The battery's lifespan is graded in cycles. 1 complete cycle is a complete discharge and recharge of a battery. A half cycle is a half discharge and recharge. Cycles, but only tell part of the story. Let us have a little deeper look at how we could best estimate and optimize a battery's lifespan.

Ni-MH Battery C4700mAh 3.6V
Nickel Cadmium Nicd Battery Pack SC1800mAh 3.6V
Ni-Cd Battery Pack D4000mAh 3.6V
Ni-Cd Battery Pack C2500mAh 3.6V
NICAD Battery Pack AA900mAh 3.6V
LiFePO4 IFR18650 1600mAh 3.2V
LiFePO4 IFR18650 1600mAh 6.4V
Ni-MH Battery C4000mAh 3.6V
E-bike Battery 48V 10Ah JL-1
E-bike battery 48V 10Ah Qing Tian