Komatsu 3.6V Crane Remote Control Replacement Battery 2500mAh

Komatsu Remote Control Transmitters — 3.6V Ni-MH 2500mAh Replacement Battery

This is a 3.6V, 2500mAh Ni-MH rechargeable battery for Komatsu remote control transmitters used in crane and lifting equipment operations. It restores cordless control functionality so operators can maintain safe working distance from the load. Dimensions are 60.35 x 54.60 x 22.20mm.

• Crane remote transmitter fit: Komatsu crane remote transmitters share a consistent voltage rail and physical form factor across their transmitter range. This cell matches the 3.6V nominal requirement and fits the battery compartment without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the bench. The BMS accepted the cell without fault codes, and the transmitter maintained stable output across solenoid activation events — no dropout under relay inrush current.
• Monthly charge cycle for stored remotes: Ni-MH cells in crane remotes left on the shelf self-discharge at roughly 1–2% per day. If the transmitter sits unused for more than three weeks, connect it to the charger before returning it to service — cells that drop too low may not respond to a standard charge cycle.

Crane remote not powering on after months of infrequent use

Ni-MH cells self-discharge faster than most operators expect. A transmitter left in a site office or equipment cab for two to three months can arrive at a voltage too low for the BMS to initiate a normal charge cycle. The cell isn't necessarily dead — it needs a slow trickle input before the BMS will allow a full charge. Connect the transmitter to its charger for at least 30 minutes before concluding the battery has failed. If the charger accepts the cell and begins charging, allow a full cycle before testing the remote.

Remote showing low battery immediately after installing a new cell

New Ni-MH cells ship at storage voltage — typically around 1.0–1.1V per cell — not at full charge. The transmitter's charge indicator reads this as low battery because it is low at that point. This is normal and not a fault with the cell. Place the transmitter on charge immediately after installing the new battery and run a complete charge cycle before use. The low battery warning should clear once the cell reaches approximately 1.4V per cell under load.