About this replacement
Ikusi TM63 / TM64 02 — 7.2V Ni-MH Replacement Battery (BT12)
This is a 7.2V, 2000mAh Ni-MH replacement for the Ikusi BT12 battery pack. It fits the TM63 and TM64 02 wireless crane remote controllers used in industrial lifting and hoist operations. Voltage and cell count match the original specification exactly.
- TM63 and TM64 02 compatibility: Both remotes run the same 7.2V six-cell Ni-MH architecture and share the BT12 connector footprint and housing dimensions. A single cell pack covers both units without modification.
- Bench tested on actual hardware: We cycled this pack through repeated solenoid-activation sequences on a TM63 test rig. The BMS held stable through inrush current spikes at relay activation with no mid-operation dropout.
- First-use charge on crane remotes: Ni-MH cells ship at partial storage voltage. On a crane remote, operating at low cell voltage during solenoid activation can trigger a premature low-battery cutoff. Charge the pack fully before the first use — put it on the Ikusi charger until the charge light confirms completion.
Solenoid activation causing power dropout on a fresh BT12 pack
When a crane remote fires a solenoid or relay, inrush current spikes sharply for a fraction of a second. If the battery is at partial charge, cell voltage can dip below the BMS cutoff threshold during that spike, and the remote drops out mid-command. This is not a faulty battery — it is a voltage-sag event on an under-charged pack. Ni-MH cells at storage voltage simply cannot sustain the instantaneous current draw. A full charge before field use eliminates this entirely.
Remote showing low-battery warning immediately after fitting a new pack
A new Ni-MH pack sitting in storage self-discharges slowly and arrives well below its rated voltage. The TM63 reads cell voltage at power-on, and if it sees less than approximately 6.0V across the pack, it flags low battery straight away. This is not a defective cell — it is a storage-state reading. Place the pack on the Ikusi charger for a full charge cycle before diagnosing a fault. After a complete charge the voltage should return to 7.2V and the warning clears.