How do you replace the battery?

Open the battery compartment on the back side of the solar panel. You will need a small Philips head screwdriver to open. It takes a rechargeable 18650 size, 3.2 volt, 1500 mAh 4.8 watt/hour lithium ion (Li-ion) battery. Refer to the user manual for step-by-step instructions on how to properly remove and replace the battery.