DBPOWER 900mAh Rechargeable Battery for SJ4000 and SJ4000 WIFI Action Camera 1. Newest Top quality DBPOWER SJ4000 improved battery features 3.7V, 900mAh with safer,longer life 2. Powered with most standard USB Wall or Auto Charger or a computer 3. Premium Japanese cells for longer battery life with no memory effect 4. Fully compatible with the DBPOWER camera and charger 5. Includes battery with 1-year manufacturer warranty