HILTI B36 36V Cordless Hammer Drill Replacement Battery 3000mAh

HILTI TE6-A36 / WSR36-A — 36V Li-ion Replacement Battery (B36 / 2203932)

This 36V, 3000mAh Li-ion battery replaces the HILTI B36 pack used in the TE6-A36 rotary hammer, TE6-A Li, and WSR36-A reciprocating saw. All three tools share the same 36V slide-in platform and B36 BMS handshake protocol. Capacity is 3000mAh (108Wh), matching the original specification.

• TE6-A36 / TE6-A Li / WSR36-A platform fit: These three tools run the same 36V rail and use an identical B36 battery slot with matching terminal layout and BMS communication lines. One battery works across all three without adapters.
• Bench tested on actual hardware: We ran this pack on the TE6-A36 through repeated hammer-drill cycles. The BMS handled motor-start inrush current without tripping and held the voltage rail stable through sustained load sequences.
• Motor inrush conditioning on first use: On first use, run the TE6-A36 at partial load for two cycles before driving it hard into concrete. This lets the BMS log the motor's inrush current signature before setting its overcurrent protection thresholds — reducing nuisance cutouts during heavy chiseling.

BMS cutoff on TE6-A36 motor-start inrush surge

The TE6-A36's brushless motor draws a sharp current spike the instant the trigger is pulled — particularly in hammer mode against hard concrete. If the BMS has not yet profiled that inrush pattern, it can read the spike as an overcurrent fault and cut the cell output within milliseconds. This is not a dead battery — it is a protection event. The pack typically resets after a 10–30 second rest. After two or three full work cycles, the BMS adapts its threshold and nuisance trips drop off.

Charger shows blinking red and never accepts the pack after storage

Li-ion cells self-discharge during storage. If the pack sits unused for several months, individual cell voltages can drop below the charger's acceptance window — typically under 2.5V per cell on a 36V pack. The charger blinks red because it detects a voltage below its safe charging threshold, not because the pack is dead. Place the pack in the charger and leave it connected for 20–30 minutes — most HILTI chargers run a trickle recovery cycle before switching to full charge. If the charger still rejects it after 30 minutes, measure the pack's output voltage; anything above 25V can usually be recovered with a second attempt.