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The MK ES1.2-12 is a sealed lead-acid battery in the 12V, 1.2Ah class, built as a drop-in replacement for the original battery in small backup and standby devices. It uses the standard ES terminal layout and the same block format as the battery it replaces, so it fits the same compartments and wiring. It suits owners of alarm panels, small UPS units, emergency lights and similar gear who need a fresh battery rather than a new device. Against generic no-name replacements, the MK brand is the point: it is a recognized name in sealed lead-acid standby batteries, and the ES series is the line most often specified for this kind of equipment.
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This is a Pro-Series PSV1213 replacement battery, cross-referenced to the ES1.2-12 MK. The battery you receive is a Pro-Series PSV1213, not an ES1.2-12-branded battery. It is a 12V, 1.3 Ah sealed valve-regulated lead-acid (VRLA) battery with F1 terminals, for standby and cyclic power.
It is built with AGM (absorbed glass mat) technology in a durable sealed ABS case that resists vibration. It is maintenance free, with no watering or terminal service needed. Self-discharge is under 3% per month at 25°C, and it discharges from −20°C to 60°C.
The Pro-Series PSV line is used for backup power, emergency lighting, security systems, medical devices and portable equipment. Other uses include wild game feeders or decoys, sump pumps, electric fences and electric gates.
