Upgraded 850amh battery can provide approximately 120 minutes usage time for RUNCAM HD. Features: Color: Silver Capacity: 850 mAh Net Weight: 15g Size: 8mm x 30mm x 35mm Suitable for RunCamHD About how to replace the lens module, please refer to below instruction video: Specifications: Package 1 X 850mah Rechargeable Li-Ion Battery