Cellink is a South Korean producer of high-quality battery packs and power banks. Cellink makes, among other things, the battery packs of BlackVue, but these are also marketed under their own label. Cellink battery packs are useful for connecting a dashcam without touching the electrical circuit of the car.
Cellink makes LiFePO (Lithium iron phosphate battery) battery packs that are very useful for powering your dashcam while parking. Cellink also offers extension packs to increase the capacity of the battery so that you will never run out of power again.