About this replacement
HBC TTB 10 — 6V Ni-MH Replacement Battery (BT213020)
This is a 6V, 2000mAh Ni-MH battery for the HBC TTB 10 wireless crane remote transmitter. It replaces OEM part numbers BT213020 and BT213001. If your crane remote has lost charge capacity or won't hold power through a shift, this is the direct cell replacement.
- TTB 10 transmitter fitment: The TTB 10 uses a proprietary battery bay sized at 166.60 × 56.90 × 20.50mm with a 6V Ni-MH chemistry requirement. The onboard circuit expects that voltage rail and that chemistry — substituting Li-ion or a different voltage pack will cause the remote to fault or fail to register with the crane receiver.
- Bench tested on actual hardware: We cycled this battery through repeated solenoid-activation sequences simulating real hoist commands. The BMS held stable through sustained inrush current events with no cutoff or voltage dropout during switching.
- Storage charge for infrequent use: Crane remotes often sit unused for weeks between jobs. Ni-MH cells self-discharge at roughly 20–30% per month — leave this battery unattended long enough and you will arrive on site with a dead remote. Run a charge cycle every four weeks during idle periods.
Solenoid activation causing power dropout on the TTB 10
When the TTB 10 sends a hoist or travel command, the crane's solenoid or relay draws a sharp inrush current through the transmitter's power circuit. A battery with degraded internal resistance — or one at low state of charge — will sag below the remote's minimum operating voltage at that exact moment. The remote interprets this as a power loss and either resets or drops the command signal. The fix is to start with a fully charged battery, since Ni-MH cells at 100% charge have their lowest internal resistance and best current delivery. If dropout persists with a new battery, check terminal contact pressure inside the battery bay.
Remote showing low battery immediately after fitting a new cell
Ni-MH batteries ship at storage voltage — typically 5.4–5.7V for a 6V pack — not at full charge. The TTB 10 reads voltage to estimate state of charge, so a partially charged cell will trigger the low-battery indicator straight away. This is not a fault with the battery. Connect the transmitter to its charger for a full cycle before the first use. After a complete charge, the voltage should sit at approximately 7.2V open-circuit and the low-battery warning will clear.