The lithium-ion PowerPack500 battery has every one of the features: his weight and dimension compared to its Strength density help it become probably the most powerful in its class. Sealed bearing headset and base bracket (for protection in wet environments) and Bosch utilizes a proprietary mini splined crank arm interface, https://tituskanyj.shoutmyblog.com/26833815/bosch-powerpack-500-wh-can-be-fun-for-anyone