Makita 6722DW Cordless Screwdriver Replacement Battery 4.8V 2000mAh

Makita 6722DW Series — 4.8V Ni-MH Replacement Battery (TL00000012)

This is a 4.8V, 2000mAh Ni-MH replacement battery for the Makita 6722DW, 6723DW, and 6722D cordless screwdrivers. These compact screwdrivers are common on fastening and light drilling work where a small, handheld form factor matters. Slot this pack in when the original cell block can no longer hold a working charge.

• 6722DW, 6723DW, and 6722D compatibility: All three models run the same 4.8V rail with an identical battery housing and contact layout. The cell block dimensions — 50.86 × 28.96 × 28.96mm — match the original cavity without modification. No adapter, no rewiring.
• Bench tested on actual hardware: We cycled this pack through repeated trigger-pull load sequences on a 6722D. The Ni-MH cells recovered voltage quickly between bursts, and the internal protection circuit held steady across motor-start inrush without tripping.
• Break-in procedure for Ni-MH cells: Run two full discharge-and-charge cycles at light fastening load before using the screwdriver at maximum torque. Ni-MH cells need conditioning cycles to reach rated capacity — skipping this leaves measurable capacity on the table in early use.

Why the 6722DW stalls or cuts out on trigger pull

At trigger pull, a cordless screwdriver draws a short inrush spike — often three to five times the running current — before the motor reaches speed. On a degraded or deeply discharged Ni-MH pack, internal resistance is high enough that this spike collapses the cell voltage below the protection circuit's cutoff threshold. The tool stops instantly, even though the battery showed a charge. A fresh, fully conditioned pack keeps internal resistance low and handles that inrush without a voltage drop that triggers the cutoff.

Charger light stays red and never switches to green on a new pack

Makita's original chargers for this voltage range use a delta-peak detection method — they look for a small voltage drop that signals the cells are full. If a new Ni-MH pack has sat in storage, cell voltage can drift low enough that the charger won't begin a standard charge cycle. To recover it, place the battery in the charger and leave it for 30 minutes; some chargers apply a trickle pre-charge to bring the pack above the acceptance threshold before switching to full charge. If the light stays red beyond that, check the pack contacts are clean and seated — corrosion on the terminal strip is a common cause. A correctly seating pack at 4.8V nominal should trigger charge acceptance within a few minutes.