Robomow RC Compatible Battery 25.6V 3000mAh BAT7000B

Robomow RC / TC Series — 25.6V Li-ion Replacement Battery (BAT7000B)

This 25.6V 3000mAh (76.8Wh) Li-ion battery replaces OEM part BAT7000B on Robomow RC and TC series robotic lawn mowers, including the Premium RC302, RC304, and over 20 additional variants. It slots into the battery bay directly and communicates with the mower's onboard BMS via the original connector. Capacity figures are matched to OEM specification — no compromise on cell count or pack voltage.

• RC and TC platform compatibility: Robomow's RC and TC lines share the same 25.6V battery architecture, connector pinout, and BMS handshake protocol. That shared platform is why a single pack covers such a wide model range — the mower's main board reads cell voltage and temperature data from the same register across all variants listed.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on an RC series mower, monitoring BMS cutoff thresholds and cell balancing behaviour. The protection circuit responded correctly to simulated over-current events, and cell balance at end-of-charge was within 20mV across all cells.
• Seasonal storage tip: Before putting the mower away for winter, bring the battery indoors and store it at 40–60% charge. A fully charged or fully depleted Li-ion pack left in a cold garage over several months degrades faster — and a pack that drops below the BMS acceptance threshold may not charge again without a manual reset.

BMS cutoff on thick-grass or wet-grass blade load

When the blade motor hits dense or wet grass, inrush current can spike sharply above steady-state draw. If the BMS reads that spike as an over-current fault, it cuts output to protect the cells — the mower stops mid-zone and the indicator light flashes. This is not a faulty battery; it is the protection circuit doing its job. Let the mower sit for five minutes before restarting, and consider adjusting the mowing schedule to avoid cutting wet grass, which consistently produces the highest blade load on this platform.

Charger showing a fault light after the mower sat all winter

Li-ion cells self-discharge slowly over months. A pack stored at low charge in a cold garage can drop below the charger's acceptance voltage — typically around 20V on this platform — and the charger refuses to begin the charge cycle, showing a fault or amber light instead. Some Robomow chargers include a recovery mode: disconnect the pack, wait 60 seconds, reconnect, and the charger attempts a trickle pre-charge to bring cell voltage back above the acceptance floor. If the charger does not recover the pack within 15 minutes of trickle mode, the cells have discharged too deeply to recover safely.