Assist Slim Endurance Battery Assist Plus Machined in the USA from

Machined in the USA from 6061-T6 aluminum alloy

Built-in protection against overload

see the Fusion Base Kit here by adding a separate Fusion Battery and Integrated Mast Motor Bundle individually

The perfect Assist Slim bundle to suit your RRD Integrated Mast is:

Assist Slim Endurance Battery Assist Plus Machined in the USA fromThe Foil Drive Slim Endurance Battery is the larger SLIM battery with 241Wh capacity. The Endurance Battery is great for those who are wanting to lengthen their runtime with the Assist Slim, however, due to the lower voltage this battery does not provide the same level of thrust and overall ride experience as the Slim Performance Battery. The Slim Endurance Battery is the only Gen2 battery that runs on a 28V system. This means you must use the 28V