Battery for Mitsubishi PLC memory backup
The Mitsubishi Electric Q7BAT is the backup battery that keeps SRAM program and retentive data alive in Mitsubishi PLC CPUs when main power is off. It is listed in the PLC I/O & Expansion Modules category, reflecting its role as a consumable support component for the processor rack.
The Q7BAT is at a mature lifecycle stage — it has been in the Mitsubishi Electric catalog for years and remains a standard service part for legacy and current Melsec Q-series racks.