Bosch 12010776 Cordless Vacuum Replacement Battery 14.4V 3000mAh

Bosch 12010776 — 14.4V Ni-MH 3000mAh Replacement Battery

This is a 14.4V Ni-MH replacement battery rated at 3000mAh (43.2Wh) for the Bosch 12010776 cordless vacuum. It fits the handheld and stick vacuum models that use this OEM part number. The cell pack matches the original voltage rail and connector format used on these units.

• 12010776 platform fit: These Bosch cordless vacuums share a fixed 14.4V Ni-MH architecture with a direct connector and BMS handshake tied to cell chemistry. Substituting a different chemistry or voltage causes the charger to reject the pack or the vacuum's motor controller to run out of spec.
• Bench tested on actual hardware: We cycled this pack through the vacuum's motor load profile and confirmed the BMS held stable through both normal suction draws and the higher-current spikes that occur when the motor fights partial blockages. Cell temperature stayed within safe range across the full discharge curve.
• Dock charging behaviour on Ni-MH vacuums: Do not leave this vacuum sitting on the charging dock indefinitely. Ni-MH cells on continuous trickle charge develop capacity fade significantly faster than cells charged only when depleted. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low

Ni-MH cells show voltage sag under sustained motor load before the pack is actually depleted. On the Bosch 12010776, this shows up as weakening suction while the indicator still reads mid-charge. A partially blocked filter makes this worse — the motor draws more current to compensate, which deepens the voltage sag and triggers what feels like premature battery failure. Clean or replace the filter first, then reassess actual battery performance.

Motor cutting out on thick carpet and then recovering seconds later

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, clogged nozzle, dense carpet pile — the motor pulls sustained current above the BMS threshold, and the pack disconnects to protect the cells. The brief recovery you see is the BMS resetting after the thermal or current condition clears. Check the filter and nozzle for restriction before assuming the battery is at fault. If the cutout persists on a clean filter, verify the pack is reading above 12.8V under light load before concluding the cells have degraded.