Please review the instructions and warnings in the battery charger user manual before charging your power wheelchair for the first time. Batteries should be fully charged every day after use, in a cool, well-ventilated area. Always charge Permobil batteries with the Permobil VoltPro charger on setting one (I). For non-Permobil batteries, setting three (III) should be used. Use the lights on the front of the charger to confirm the charging profile and to ensure the batteries are fully charged before use.