BatteryJack inc. 12V 18AH Battery for Black & Decker CMM1200 Mower 2 Pack

Two-pack replacement battery

This two-pack supplies 12V 18AH sealed AGM units built to replace the original 24V battery in a Black & Decker CMM1200 mower. The absorbed glass mat construction keeps electrolyte locked in place so the batteries can operate in any orientation without leakage. Each unit is maintenance-free and rated for a 4-7 year service life under normal use. The pack delivers 100% OEM-compatible performance for cordless mowing.

Fits CMM1200 without modification

The batteries slot directly into the existing compartment and connect to the mower's wiring harness with no adapters required. Their sealed, non-spillable design meets IATA transport rules and eliminates the need to check electrolyte levels or add water during the service interval. Gas recombination handles over 90% of generated gas internally, so the pack stays sealed throughout its working life. This frees the operator from routine battery upkeep.

Sustained discharge under load

During extended cutting sessions the AGM plates deliver steady current without the voltage sag common in flooded cells. The recombination system keeps internal pressure stable even when the mower draws continuous amperage through thick grass. Expected floating life of 4-7 years assumes regular recharge cycles rather than deep discharge storage. The three-year warranty on backup-class devices reflects the manufacturer's confidence in long-term reliability.