Specifically designed for Insta360 X4. Large capacity battery of 2290 mAh, 27% more than the previous generation. Battery life has increased by up to 67%, allowing for 135 minutes of recording at 5.7K30fps. It functions perfectly even at temperatures down to -20°C, with no impact on performance. Includes: 1x Insta360 X4 Battery, 1x Battery Cover.