Battery Life Solar Battery Chargers + Maintainers are designed to counteract the effects of natural battery drain due to time, climate and conditions. Batteries slowly discharge over time when not in use and the constant demand from vehicle’s computer and electronics leave the battery in a discharged state. Unless the battery is being charged, it is always loosing capacity, which will lead to sulfation, and ultimately, battery failure. Battery life can be increased, sulfation prevented, and full power restored by simply leaving the battery connected to Battery Life Solar.