Magicshine Battery MJ-6106, Super high Capacity 7.8Ah 6 Cell Waterproof Bike Light Battery for MJ-908, Eagle M2 Eagle F3 MTB Lights. Magicshine Rechargeable Bike Light Battery Pack MJ-6106. 6 cell 7.4V 7800 mAh capacity. Compatible with all Magicshine bike lights with 4 pin plug Eagle M2, F3 MJ-908, Comes default with MJ-908. The battery is more ergonomic and straps neatly to your frame using two nylon straps The new waterproof battery compartment design and high quality and large area silicone non-slip mat All Magicshine batteries include BMS with over-charge, over-discharge, over temperature and short circuit protection meaning you can be sure that your Magicshine battery is safe to use and charge.