MG Electronics MG-12V4.5AH Sealed Lead-Acid Battery

Maintenance-free sealed lead-acid battery with 12V 4.5AH capacity. This black unit has two metal spade terminals, one marked with a red base for polarity. It is a non-spillable rechargeable battery manufactured by MG Electronics. 3-1/2 L x 2-3/4 W x 4 H. This was used as a backup battery that was in an old security alarm system that I had replaced. It was used for about four months.