Panasonic sealed, lead-acid batteries are rechargeable batteries which require no watering. Adopting lead-tin-calcium alloy as the grid alloy, it has outstanding characteristics against severe use conditions such as overcharge, overdischarge, vibration, shock and ... for various storage conditions. The SLA battery covers a broad range of applications including VTR's, electric tools, engine starters, UPS, and other back-up power applications.