DJI Osmo Action Multifunctional Battery Case - Fast Charging, 3-Battery Storage, Power Bank for Osmo Action 3 & 4The DJI Osmo Action Multifunctional Battery Case offers intelligent fast charging for Osmo Action 3 and Osmo Action 4 batteries. It stores and charges up to three batteries while keeping your microSD cards safe. Use it as a portable power bank to charge devices like your smartphone. Key Features: Fast Charging: Simultaneously charges up to three Osmo Action batteries. Storage: Holds three batteries and two microSD cards. Portable Power Bank: Charge