Itowa Compact Crane Remote Replacement Battery 7.2V 2000mAh

Itowa Compact / Combi / Beton / Setval — 7.2V Ni-MH Replacement Battery (BT7223)

This is a 7.2V, 2000mAh Ni-MH replacement battery for Itowa crane remote controls, including the Compact, Combi, Beton, and Setval models. It replaces OEM part numbers BT7223 and BT7223MH. These remotes operate overhead cranes and hoists in industrial environments, so a dead battery means a stopped lift.

• Compact, Combi, Beton, Setval compatibility: All four models share the same 7.2V cell stack, connector pinout, and BMS handshake protocol — one battery fits the entire range without modification.
• Bench tested on actual hardware: We cycled this battery through solenoid activation sequences on the bench. The BMS held stable through repeated inrush events and did not trip under normal relay switching loads.
• Monthly charge during idle storage: Ni-MH cells self-discharge at roughly 20–30% per month. If the remote sits unused on a shelf, charge it once a month — cells left fully discharged for extended periods suffer permanent capacity loss that no charger can reverse.

Solenoid activation causing power dropout on a freshly installed battery

When a solenoid or relay engages, it draws a sharp inrush current — sometimes 3–5× the steady-state draw. If the battery is at storage voltage rather than full charge, its internal resistance is higher and voltage sags hard under that spike. The BMS reads the sag as an undervoltage fault and cuts output. This looks like the remote dying mid-command, not a faulty remote. Charge the battery to full before the first use — a rested Ni-MH cell at full charge handles inrush with far less sag.

Remote showing low battery indicator immediately after fitting a new cell

A new Ni-MH battery ships at storage voltage — typically 60–70% state of charge, not full. The Itowa remote reads cell voltage on boot and flags anything below its low-battery threshold immediately. This is not a faulty battery. Connect the remote to its charger and run a full charge cycle before use. Once fully charged, the low-battery warning will clear and the remote will operate normally.