"Recirculating Power Supply System：Charging dock and 2 B2 battery packs enable continuous cycle charging and power supply. No need to remove the helmet to charge during the game,The magnetic connection design minimizes the difficulty of charging operation, and can be charged with one-handed operation. Recirculating Power Supply System：Charging dock and 2 B2 battery packs enable continuous cycle charging and power supply. No need to remove the helmet to charge during the game,The magnetic connection design minimizes the difficulty of charging operation, and can be charged with one-handed operation. Magnetic HOT-SWAP：Using the magnetic battery design launched by BOBOVR, 5200mAh industrial-rank high energy density battery with enhanced working efficiency, each battery can provide 2 hours (APP depends) of VR time, and it only takes 3 hours to fully charge Brand: BOBOVR Date First Available: October 10, 2023 Battery Capacity: 5200 Milliamp Hours Model Name: M3 Pro Battery Cell Type: Lithium Ion Unit Count: 1.0 Count Antenna Location: Strap Compatible Phone Models: Quest 3 Recommended Uses For Product: Strap ASIN: B0CKSYBCVQ Battery Cell Composition: Lithium Ion"