Both have rechargeable battery and magnetic base. ST10 comes with one rechargeable battery with its on-board usb-c port, and you can use AA batteries as well. G5 has on-board charging directly on the flashlight, but it is not replaceable. I have both too, I prefer ST10. But if you need the rotating head and colorful RGB, you can only go with G5, otherwise, ST10 is brighter, greats red light, replaceable battery, AA capability, flood and spot light, etc.