Metabo BHA 36 LTX 36V 2000mAh Li-Ion Replacement Battery

Metabo BHA 36 LTX Series — 36V Li-ion Replacement Battery (6.25453)

This is a 36V Li-ion replacement battery with 2000mAh (72Wh) capacity for the Metabo BHA 36 LTX rotary hammer drill. It fits the BHA 36 LTX, BHA 36 LTX Compact, AHS 36V, and BHA36LTX. The connector and BMS handshake match the original Metabo 36V platform — the tool recognises the pack and charges normally on standard Metabo chargers.

• BHA 36 LTX platform fit: These models share the same 36V battery rail, connector pinout, and BMS communication protocol. The charger and tool both query the pack's internal data lines — this battery answers that handshake correctly, so no error codes appear during charge or use.
• Bench tested on actual hardware: We ran this pack through motor-start inrush cycles on a rotary hammer under concrete drilling load. The BMS held the voltage rail stable through repeated trigger pulls and did not trip on the initial inrush spike.
• Break-in on rotary hammer loads: On first use, run the tool at half load for two cycles before full-torque concrete drilling. This lets the BMS log the motor's inrush current pattern and set its overcurrent threshold accurately before you hit maximum impact and rotation simultaneously.

BMS overcurrent trip on motor-start inrush in rotary hammer mode

Rotary hammer drills draw a sharp current spike the instant the trigger is pulled — the motor starts under load, especially in hammer-only or combined rotation-plus-impact mode. A new pack's BMS has not yet profiled the tool's inrush signature, so its overcurrent threshold may be conservative. If the pack shuts off on the first hard trigger pull, remove it, wait 10 seconds, and reinsert. Two or three of these cycles teach the BMS the tool's actual inrush profile, after which cutoffs stop.

Pack reads as charged but tool bogs down mid-hole in concrete

This is voltage sag — under sustained hammer-drill load, internal cell resistance causes the rail voltage to drop below the tool's minimum operating threshold even though the resting voltage looks fine. Check that the battery contacts in the tool's slot are clean and making full contact; oxidised or worn contacts increase resistance and worsen sag. If contacts are clean and sag persists, measure resting voltage with a multimeter — a healthy 36V Li-ion pack at partial charge should read above 33V at rest. Below that, the cells are capacity-faded and the pack needs replacing.