I don't know. Ask slvoid. The other key variable is low temps. at 5F, a NiMH battery will operate at 35% power and life while a LIIon will be at 92%. It's a sharp curve, and above 50F, they are the same. So if ride in cold temps, may want to spend a few more bucks. Other key variable is Liion last 3 years from date of manufacture, and NiMH last about 5 years. Similar to a car battery. Even though they are the same at about 500 recharge cycles, unless you ride a lot at night, you might be caught by the lifetime limit before the recharge limit.