ANART Cradle Charger Holder Battery Charger Case + 1050mAh 3.7V Li-ion Rechargeable Battery for SJCAM SJ4000 ANART DBpower GooKit Action cam For all those who have an action camera, I believe this is a must product. High Capacity 1050mAh Backup Rechargable Li-ion Battery. It works well charged fast and cradles them when they are charged. Small and convenient when traveling. This charger is great for charging your battery up. It gives you extra the recording time with your sports camera. To charge simply plug the charger into any USB cable you already have. When charging the light is red and when fully charged it turns blue. The pack included the charging cradle and rechargeable battery as in the photo.