This is a battery case and two batteries from the Osmo Action 5 Pro Adventure Combo. I'm selling them because I only need one battery now. They've been charging for the past year, so please be aware that there may be some degradation. Battery Case Overview It can store 3 batteries and 2 microSD cards. It can smartly charge three batteries, and can also be used as a power bank with the batteries inside, allowing you to charge devices such as smartphones. Included Items Osmo Action Multifunctional Battery Case 2 Specifications Size: 116.2 x 59.2 x 22.9 mm (Length x Width x Height) Weight: 83 g Compatibility Osmo 360 Osmo Action 5 Pro Osmo Action 4 Osmo Action 3 Battery Overview This 1950 mAh high-capacity battery is designed to withstand low temperatures and operates reliably in environments from -20° to 45°C. Included Items Osmo Action Extreme Battery Plus (1950 mAh) Specifications Capacity: 1950 mAh Operating Temperature: -20°C to 45°C Weight: 34 g Size: 44.2 x 34.4 x 12.1 mm (Length x Width x Height) Compatibility Osmo 360 Osmo Action 5 Pro Osmo Action 4 Osmo Action 3