Will the CITYORK 8000mAh fit a Dyson V8?

No. It is listed for V11, V15, Outsize and SV-series models. The V8 takes the Kastar pack or another 215967-01/02 replacement.

Does the Kastar battery fit a V11?

No. It replaces Dyson 215967-01/02 and similar V8 part numbers. Check the number printed on your current battery before ordering.

Which gives longer runtime?

The CITYORK, on paper. At 8000mAh it holds roughly 2.9 times the charge of the Kastar's 2800mAh, though CITYORK does not publish a run time figure.

Is the CITYORK worth $20 more?

Only if you own a V11 or V15. For a V8 it does not fit at all, so the $39.99 Kastar is the only option of the two.

How long does the Kastar last?

Kastar states a 12-month warranty. Real-world life depends on charge habits; keep the pack between 5% and 95% and avoid heat above 140°F.

Do both need a full charge before first use?

CITYORK says to fully charge before first use. Kastar does not state this, but a full charge before first use is standard for Li-ion packs.

CITYORK 8000mAh V11 Replacement Battery vs Kastar Dyson V8 Replacement Battery

These are not interchangeable: the CITYORK 8000mAh pack fits Dyson V11, V15 and Outsize models, while the Kastar 2800mAh pack fits only the V8. Buy the CITYORK if you own a V11 or V15 and want roughly triple the original runtime. Buy the Kastar if you own a V8 and want the cheapest working replacement. As of November 5, 2026, the CITYORK is $59.99 at Walmart and the Kastar is $39.99 at Walmart.

Today the Kastar Dyson V8 Replacement Battery costs $20.00 less at its best price.

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