The Reolink Argus2.
Argus 2 has its rechargeable battery cover which is removable for charging.
The charger is USB adapter (DC 9/5Volts) which is commonly used for smartphones (not included in the box). A micro-USB cable is included in the box.
You can remove the battery cover for charging:
or you can plug the camera into the USB adapter (then to the electrical outlet) for constant working & charging:
or charge the camera with Reolink Solar Panel (to be purchased separately):
There is only 1 battery cover with each camera, but you are able to purchase more at reolink.com or Reolink Amazon official stores.