EXTERNAL DUAL BATTERY SYSTEM offers your Rover 52V Gen5-6 or Rover Pro model bike another 20AH's to the range.

The parts for this system include:
-Battery 52V 20AH external downtube mounted lithium battery
-Battery Base, downtube mounted plate
-Battery Balancer Module
-Charger 52V ST3 Port

Simply Install to your bike and use the connectors inline with your current battery to controller! The system will use both batteries simultaneously until both batteries are drained, giving you some serious eBike range!

Battery Dimensions: L 370 x W 100 x H 150.8 (mm)