The set comes with two batteries. The charger provides protections against overcharge, short circuit and over discharge, overheating, overcurrent and overvoltage. Lightweight, easier to carry on trip. Color: Black Battery type: Li-ion rechargeable battery Battery capacity: 1800 mA Charger input: 5V / 2A Charger output: 4.4V / 800mA (X2) Weight: 90.6g Charger socket type: Type-C/Micro USB Applicable to: GoPro Hero 9 Black Size: Charger: 5.7x4.7x2.2cm; Battery: 3.4x1.3x4.1cm Note: 1. Do not mix the battery with metal objects, avoid metal objects touch the positive and negative electrodes of the battery, causing a short circuit, damaging the battery or even causing danger. 2. The battery should be used in a clean, dry and ventilated environment, avoid contact with corrosive substances, and keep away from fire and heat sources. 3. This product is only GoProHero9 battery & charger set, no other decorations. 4. Due to different lighting and screen settings, the color of the item may differ slightly from the picture. 5. Due to manual measurement, please allow slight difference in dimension. What's in the box? 2 x Battery 1 x Charger