Hilti BP60 24V Rotary Hammer Replacement Battery 3300mAh

HILTI TE 5 A / C 7/36 Series — 24V Ni-MH Replacement Battery (BP60 / BP72)

This is a 24V, 3300mAh Ni-MH replacement battery pack for the HILTI TE 5 A rotary hammer and the C 7/24, C 7/36, and TCU 7/36 range. It replaces OEM part numbers BP60 and BP72. The pack slots into the original battery bay and communicates with the tool's onboard charge management system.

• TE 5 A, C 7/24, C 7/36, and TCU 7/36 compatibility: All four models share the same 24V battery architecture, connector pinout, and BMS handshake protocol — one pack covers the full platform without modification or adapters.
• Bench tested on actual hardware: We cycled this pack through repeated high-torque trigger pulls on the TE 5 A and monitored the BMS response under inrush current spikes. The overcurrent protection threshold held at the expected cut-off without nuisance trips under normal drilling loads.
• Ni-MH conditioning on first use: On first use, run the tool at half load for two full cycles before hitting maximum torque applications — this allows the BMS to profile motor inrush current draw and set accurate overcurrent protection thresholds before sustained hammer use.

BMS cutoff on TE 5 A motor-start inrush surge

The TE 5 A rotary hammer pulls a sharp inrush current spike the instant the trigger is pulled — especially when starting under load in concrete. If the BMS has not profiled the motor draw, it can misread this spike as an overcurrent fault and shut the pack down. A new or recently stored pack is most vulnerable because the BMS fault threshold defaults to a conservative setting until it logs actual load cycles. Running two break-in cycles at reduced load before full hammer work lets the BMS calibrate correctly and prevents premature trips.

Pack drops off mid-use but charger shows full after a short rest

This is voltage sag — not a failed pack. Under sustained hammer load, internal cell resistance causes the pack's rail voltage to sag below the tool's low-voltage cutoff, triggering a shutdown. After a short rest, voltage recovers and the charger reads the pack as acceptable. Check the battery bay contacts first — oxidised or dirty contact pins increase resistance and worsen sag. If contacts are clean, the cells may have degraded from repeated shallow cycling; a full discharge-to-cutoff followed by a complete charge cycle can partially restore usable capacity.