There seemed to be voices talking behind the door.,"The battery in the camera is running low, so you'll have to find the spare batteries I've hidden around the factory. They are all used batteries, with just a little bit of charge left. To ensure four hours of continuous power, you'll need about eight." Hao Assistant announced the supplementary rules with a smile.,After powering on, only one-fifth of the battery power remained in the upper right corner of the camera. He fiddled with it casually and discovered that the camera had a night vision mode, which greatly facilitated their movements in the dark, although it consumed quite a bit of power.。