12v 4ah SLA AGM rechargeable battery Fresh Batteries Every Month ADT Brinks Honey Well DSC GE Battery replacement High-quality Grid: The high-quality lead-calcium-tin alloy grid, whether used in float charging or recycling, or even through many times of over-discharge, keeps strong performance and long service life Dimensions(LxWxH):3.54 x 2.76 x 3.98 inches