Model # BH29040V

ONEPWR 4Ah Battery

ONEPWR 4Ah Battery

ONEPWR 4Ah Battery

ONEPWR 4Ah Battery

Product Highlights

  • Engineered for your everyday needs, the 4Ah battery is best for stick vacuums and medium-sized machines
  • Power through everyday cleaning with 2X longer runtime1
  • Every ONEPWR™ Battery works with every ONEPWR™ product from hard floor cleaners to vacuums, spot cleaners, hand vacuums and more. Pick the best battery for your needs
  • Intuitive lights tell you how charged your battery is and alert you of errors
  • Charge your 4Ah battery in about 1 hour2 with the ONEPWR™ fast charger

1 When compared to ONEPWR™ 2Ah Battery
2 With Fast 4Ah Charger at room temperature

Regular price $99.99
$99.99 Regular price $99.99 Sale price
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Model # BH29040V
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Power your Hoover® Cordless products with the ONEPWR™ Battery System. From hard floor cleaners to vacuums, leaf blowers, hand vacuums and more, the ONEPWR™ Battery System has the right battery to power any cleaning job. The 4Ah battery is designed to be compact and lightweight to reduce user fatigue while optimizing maneuverability. With lithium-ion battery technology, you get long, lasting fade-free power and runtime to tackle any job, anywhere.


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  • Assembled Unit Depth 5.07 In Assembled Unit Height 3.46 In Assembled Unit Width 2.20 In Battery Amp Hours 4 Color Black Cordless Yes Lightweight Yes Performance Check Indicator Yes Product Weight 1.2 Lbs Safety Rated UL Usage Home Use

Frequently Asked Questions

Can you use the ONEPWR battery with other cordless Hoover products?

Every ONEPWR battery is 100% compatible with every Hoover 20V product. You can swap the batteries between your cordless products as much as you want!

How do I check how much charge my battery has left?

Press the battery icon next to the indicator lights to display how much charge is left on the battery.

What’s the battery’s runtime?

The battery runtime depends on which ONEPWR product and what suction mode it’s being run on. The ONEPWR 8Ah battery will provide 2x the runtime as the ONEPWR 4Ah battery and 4x the runtime compared to the ONEPWR 2Ah battery.

How long does it take to charge the battery?

Using the Hoover Fast Charger, the 2Ah battery will charge in as little 30 minutes, while the 4Ah battery will charge in as little as 1 hour and the 8Ah battery will charge in as little as 2 hours.

My battery isn’t working, what should I do?

All ONEPWER 20V batteries come with a 3-year warranty. Contact Customer Service by visiting the support page on