Metabo 6.25439 10.8V Cordless Drill Replacement Battery 1500mAh

Metabo 00385000 / PowerImpact 12 — 10.8V Li-ion Replacement Battery (6.25439)

This 10.8V 1500mAh Li-ion battery replaces the OEM 6.25439 pack across Metabo's 10.8V cordless tool lineup. It fits the 00385000, 8051275002, PowerImpact 12, and PowerLED 12, among others. Slot it into the original charger — no adapter needed.

• 10.8V platform fit: These models share a common 10.8V battery rail, a three-cell Li-ion stack, and the same BMS handshake protocol. That's why one pack works across compact drills, impact drivers, and task lights in this lineup — the cell count and communication line are identical.
• Bench tested on actual hardware: We ran this pack through the OEM charger and cycled it under drill and impact driver loads. The BMS held overcurrent protection thresholds through repeated trigger-pull spikes without nuisance tripping.
• Motor inrush conditioning on first use: On first use, run the tool at half load for two cycles before full-torque applications. This lets the BMS profile the motor's inrush current draw and set its overcurrent trip threshold correctly before you're driving long fasteners or boring through hardwood.

BMS cutoff on motor-start inrush surge in the PowerImpact 12

The PowerImpact 12's impact mechanism draws a sharp current spike the instant the trigger engages — often 15–20A for a few milliseconds before the motor settles. A new or cold pack may have a BMS that hasn't yet logged that spike as normal, so it trips the overcurrent protection as a precaution. This shows as the tool cutting out immediately on trigger pull, then recovering after a second. Two or three light-load conditioning cycles teach the BMS the expected inrush signature and stop the nuisance cutoffs.

Charger won't recognise the pack after extended storage

Li-ion cells that have sat unused for several months can drop below the charger's acceptance voltage — typically around 2.5V per cell, or roughly 7.5V for this three-cell pack. The Metabo charger reads that as a fault and blinks an error rather than starting a charge cycle. To recover it, measure pack voltage at the terminals with a multimeter. If you're reading above 7.5V total, try a different charger port or hold the pack in the charger for 60 seconds — some units have a recovery mode that initiates a low-current wake charge once it confirms the cells aren't damaged.