Bosch 14.4V Drill Replacement Battery 3000mAh BAT140

Bosch 13614 Series — 14.4V Ni-MH 3000mAh Replacement Battery (BAT038 / BAT140)

This 14.4V Ni-MH pack at 3000mAh replaces the original battery on Bosch 13614, 13614-2G, 15614, 1661, and over 48 additional 14.4V Bosch cordless drill and driver models. It slots into the same bay and connects through the same terminal block as the factory pack. OEM part numbers covered include BAT038, BAT040, BAT041, BAT140, BAT159, and the full 2 607 335 series.

• 13614 platform fit: Every model in this compatibility list shares the same 14.4V rail, three-contact terminal layout, and charge-signal line. The BMS on each tool handshakes through the same signal pin, so one pack covers the full spread without modification.
• Bench tested on actual hardware: We cycled this pack on a 13614 under repeated full-torque fastening sequences. The BMS held the discharge curve steady through each cycle and tripped correctly at the low-voltage cutoff without nuisance shutdowns on trigger pull.
• Ni-MH motor load conditioning: On first use, run the drill at half load for two full discharge-charge cycles before pushing maximum torque. Ni-MH cells deliver peak current output more consistently after the BMS has logged two real-world load profiles from the motor inrush spike.

BMS cutoff on 13614 motor-start inrush surge

The 13614 motor draws a short but steep current spike the instant you pull the trigger — this inrush peak can be three to five times the steady running current. A new Ni-MH pack coming out of storage has cooler cells with slightly higher internal resistance, which amplifies the voltage dip at that inrush moment. If the BMS reads the rail voltage dropping below its trip threshold during that spike, it shuts the pack down before the motor reaches running speed. Two break-in cycles at half load warm the cells and lower internal resistance enough that the BMS no longer sees the inrush as a fault condition.

Charger blinks red and refuses to start a charge cycle

Bosch 14.4V chargers check cell voltage before committing to a charge cycle — if the pack has self-discharged below roughly 10V during storage, the charger treats it as a defective cell group and signals a fault with a red blink. Ni-MH packs self-discharge faster than Li-ion and can drop below this acceptance threshold within a few months on the shelf. To recover the pack, place it in the charger and hold it there for 10–15 minutes — many Bosch chargers include a trickle pre-charge mode that will slowly bring the cells up to the acceptance voltage before switching to full charge. If the charger moves to its normal charge sequence within 20 minutes, the pack has recovered; if not, check that the terminal contacts are clean and making firm contact with the charger rails.