How do I maintain and care for my Solar Lantern? Keep solar panel clean. If solar product does not light up after it has been used for around 8-12 months, replace the rechargeable batteries as they may be weak or worn out. Recommended battery 1pc AA 1.2V 600mAh, Ni-MH or equivalent must be used for best result Open the battery compartment cover and replace 1pc AA (rechargeable only). Be sure to observe the correct polarity. Related articles Is it possible to use the detachable cooler bag independently from the BBC-350-GBL chair? How do I operate my Solar Pathway Lights? My unit is not starting. Is this chair easy to set up and put away? Is this chair easy to clean?