Sealed Lead Acid battery. 2 contacts on top. 12 Volt SLA UPS Battery. Fits models; APC AP1200, APC AP1200VS, APC AP1200VX, Data Shield 800, Data Shield AT1500, Data Shield AT800 (old), Datec 7036, Deltec 2026C, Deltec 2036C, Elgar 1100, Elgar IPS1600, Elgar IPS560, Emerson 800, Exide 2026C, Exide 2036C, General Power GPS-2K-120-61, Gener