Dyson V8 Replacement Battery 21.6V 2600mAh 215681

Dyson V8 Animal / V8 Absolute — 21.6V Li-ion Replacement Battery (215681)

This is a 21.6V, 2600mAh (56.16Wh) lithium-ion battery for the Dyson V8 range of cordless stick vacuums, including the V8 Animal and V8 Absolute. It replaces OEM part numbers 215681, 215967-01/02, 215866-01/02, and 967834-02. Fit covers all V8 variants that share the same rear-mount slide-and-click battery housing.

• V8 range battery platform: All V8 variants — Animal, Absolute, and standard — share the same 21.6V cell stack, connector pinout, and BMS communication protocol. One battery fits across the full V8 line because Dyson held that architecture consistent across regional and retail SKUs.
• Bench tested on actual hardware: We ran this battery through full charge and discharge cycles on a V8 Animal. The BMS handshake completed without fault codes, motor start current was accepted without trip, and the charge indicator on the handle reported correctly across all power modes.
• Dock charging practice for V8 users: Do not leave the V8 sitting on the wall dock continuously between uses. The V8 dock provides a trickle feed once full, and cells kept at float charge degrade noticeably faster than those charged only when depleted. Charge fully, then remove the machine from the dock.

Suction dropping before the battery indicator reaches low on V8

The V8 motor draws significantly more current when airflow is restricted — a partially blocked filter or full bin makes the motor work harder against static pressure. At sustained high draw, the BMS reads cell voltage under load and begins throttling motor output to protect the cells, even though the indicator still shows charge remaining. This is not a battery fault — it is the BMS responding correctly to elevated current. Clean the filter and empty the bin, then check whether full suction returns. A filter that has never been washed is the most common cause on V8 machines with more than six months of use.

V8 motor cuts out mid-clean then comes back after a short wait

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, sealed nozzle, or a blockage in the wand — motor current spikes beyond the BMS threshold and the battery disconnects to prevent cell damage. The pack resets after a brief cooldown, which is why the vacuum works again after 30–60 seconds. Clear any blockage, wash the filter, and confirm airflow is unrestricted before continuing. If the trip repeats with a clean filter and clear airway, measure pack voltage under load — it should not sag below 18.5V during normal motor start.