The SL9000SW is based on a rechargeable 6V/4AH sealed acid battery that has an over-charge and over-discharge protection. Keeping the lantern in bright sunlight for 8 hours you will supply it with power for 3 hours. If you need it fully charged then you should keep it in the sunlight for 30 hours. If you want to use the AC adaptor or the 12V DC car plug instead, the lamp will stay alive for 18-20 hours.Solar rechargeable lantern
The SL9000SW is based on a rechargeable 6V/4AH sealed acid battery that has an over-charge and over-discharge protection. Keeping the lantern in bright sunlight for 8 hours you will supply it with power for 3 hours. If you need it fully charged then you should keep it in the sunlight for 30 hours. If you want to use the AC adaptor or the 12V DC car plug instead, the lamp will stay alive for 18-20 hours.