Black&Decker ACN-DE7.2 Dustbuster 7.2V Replacement Battery

Black&Decker DV7205 / Dustbuster Extreme — 7.2V Ni-MH Replacement Battery (ACN-DE7.2)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Black&Decker DV7205, DV7205N, Dustbuster Extreme 7.2V, and Dustbuster DV7205N H2 cordless handheld vacuums. It replaces OEM part ACN-DE7.2 and slots into the same battery bay with no modification. Capacity is rated at 2000mAh (14.4Wh).

• DV7205 and Dustbuster Extreme compatibility: All four fit models share the same 7.2V motor rail, battery bay geometry, and terminal layout. The ACN-DE7.2 part number covers the entire range — voltage and connector are identical across DV7205, DV7205N, and both Dustbuster Extreme variants.
• Bench tested on actual hardware: We cycled this cell through discharge under simulated motor load at 7.2V. The BMS held steady across draw spikes during start-up and did not trigger overcurrent cutoff under normal suction conditions with a clean filter fitted.
• Dock charging habit on the DV7205: Do not leave this vacuum sitting on the charging dock permanently. Ni-MH cells in continuous trickle charge accumulate heat and lose capacity significantly faster than cells charged only when depleted. Charge to full, then remove the unit from the dock.

Suction dropping before the battery indicator reaches low

Ni-MH cells at 7.2V nominal show voltage sag under load before the pack is actually depleted. On the DV7205, this sag hits harder when the filter is partially blocked — restricted airflow forces the motor to draw above its rated current, which pulls cell voltage down faster than the indicator registers. The result is noticeably weaker suction with charge still showing. Clean or replace the filter first. If suction recovers with a clean filter, the battery is not the cause.

Motor cuts out mid-use then restarts after a short pause

This is a BMS overcurrent trip, not a dead battery. When sustained suction restriction — blocked nozzle, clogged filter, or heavy carpet pile — forces the motor to draw continuously above the BMS threshold, the protection circuit cuts power to prevent cell damage. After a short rest, it resets and the motor starts again. Clear any blockage, check the filter, and confirm airflow is unrestricted before restarting. If the problem continues with a clean filter and clear nozzle, measure pack voltage at rest — it should read at or above 7.2V on a full charge.