Deep Cycle Design: Features heavy-duty grids and thick plates to provide up to 30% more cycle life than standard standby batteries.Maintenance-Free: The sealed, valve-regulated lead-acid (VRLA) design means no water topping up is required and the battery is spill-proof and leak-proof.Low Self-Discharge: Can be stored for up to 6 months at 25°C before requiring a recharge, with a monthly self-discharge rate typically below 3%.Wide Temperature Range: Designed to operate reliably in environments ranging from -20°C to 60°C.