About this replacement
IMET BE5000 / M550S Series — 2.4V Ni-MH Replacement Battery (AS037)
This is a 2.4V, 2000mAh Ni-MH replacement battery for the IMET BE5000 crane remote control system. It fits the BE5000, M550S, M550S Wave S, and I060-AS037 variants using OEM part number AS037. It powers the wireless transmitter unit used to operate overhead cranes in industrial and construction environments.
- BE5000 and M550S platform compatibility: These models share the same 2.4V two-cell Ni-MH battery architecture, connector footprint, and transmitter housing. The AS037 battery slots directly into each variant without modification to the battery bay or charge contacts.
- Bench tested on actual hardware: We ran this cell pack through charge and discharge cycles on the BE5000 transmitter. The battery accepted a full charge without thermal event, and the transmitter held stable voltage during repeated solenoid-activation commands — including rapid sequential crane movements.
- Monthly charge discipline for infrequently used remotes: Crane remotes often sit idle between jobs. Ni-MH cells self-discharge at roughly 1–2% per day. If the pack sits uncharged for several weeks, cell voltage drops low enough to cause erratic behaviour on power-up. Charge the battery once a month during any idle period, even if the remote has not been used.
Solenoid activation causing power dropout on a freshly installed battery
When a crane remote triggers a solenoid or relay, the inrush current spike is brief but sharp. If the battery cell voltage is at storage level rather than full charge, internal resistance is higher and the pack struggles to supply that current peak cleanly. The transmitter interprets the voltage sag as a low-battery condition and may cut output or reset. A full charge before first use eliminates this — a fully charged Ni-MH pack at 2.4V nominal handles inrush without sagging below the transmitter's cutoff threshold.
Remote showing low battery immediately after fitting a new cell
A new Ni-MH battery ships at storage voltage — typically 1.0–1.1V per cell, not the 1.2V nominal operating level. The BE5000 transmitter reads this as a depleted pack and flags low battery before the remote even cycles through its start sequence. This is not a fault with the battery. Connect the remote to its charger for a full charge cycle before use. Once the pack reaches full charge, the low-battery indicator clears and the remote operates normally.