Replace a cordless vacuum battery safely
Swapping the whole battery pack takes a few minutes on most of these vacuums. The main risk is a counterfeit or uncertified battery.
Check it's really the battery
- Wash the filters and clear any blockage. Both make the motor draw more power and shorten run time.
- Compare run time in normal mode, not MAX or Boost.
- Let a cold vacuum warm to room temperature. Dyson V11s switch off below 50°F, and V15s won't run below 41°F.
- Look up your model's light codes. A battery-fault light is a reason to replace the pack, or to contact the manufacturer if it's under warranty.
Dyson recommends running its online troubleshooting before buying a battery.
Genuine battery part numbers
| Model | Genuine pack | How it comes out |
|---|---|---|
| Dyson V6 | 967810-23 | 2 screws |
| Dyson V7 | 968670-06 | Screws under the bin |
| Dyson V8 (SV10, SV10E, SV25) | 974815-01 | 3 screws |
| Dyson V10 | 969352-03 | 3 screws |
| Dyson V11 click-in, V15 Detect | 970938-01 | Release button |
| Dyson V11 screw-in (SV14) | Check with Dyson | 3 screws |
| Shark Stratos IZ862H | XBATR725SL | Release button |
| Shark Vertex IZ462H | XSBT750 | Release button |
| Shark Vertex Pro IZ662H | XBATR725 | Release button |
| Roomba i3, i4, i7 | iRobot 4624864 | 5 screws on the bottom cover |
Step-by-step swaps are on each model page.
Avoid counterfeit and no-name packs
In January 2024 the U.S. Consumer Product Safety Commission warned owners to stop using ZAUTNKN.INC replacement batteries for Dyson V6 vacuums, sold on Amazon for $15 to $40, after three fire reports and one smoke-inhalation report. The packs weren't compliant with the UL 1642 safety standard, and the seller didn't agree to a recall. Read the CPSC warning.
Dyson says only a genuine Dyson battery keeps the machine working as intended and the warranty intact. iRobot says aftermarket batteries can cause charging errors and void the warranty. If you buy elsewhere, choose a pack certified to a recognized battery safety standard from a seller you can trace, and be wary of prices far below the genuine part.
What not to do
- Don't open a battery pack, replace cells or try to "reset" its electronics.
- Don't charge or use a pack that is swollen, cracked, leaking, hot or smells of burning.
- Don't use a charger that isn't made for your vacuum.
- Don't put old lithium-ion packs in the trash or curbside recycling. Take them to a battery recycler or household hazardous waste site.