Free Shipping on Domestic Orders $75+

Dyson DC35 Battery Replacement

eCuration and one other contributor

Last updated on Jul 21, 2026

512

View statistics:

Past 24 Hours:: 5
Past 7 Days:: 60
Past 30 Days:: 229
All Time:: 512

No one has left comments on this guide. Will you be first?

Go to guide comments

No one has marked this guide "completed." Will you be the first?

No one has favorited (and subscribed to) this guide. Will you be the first?

20 - 40 minutes

Moderate

Video Guide This guide was transcribed from a YouTube video.

Introduction

Go to step 1 ↓

Use this guide to replace the battery in a Dyson DC35 cordless vacuum when it won't run, won't charge, or the green charge light doesn't come on. The battery stores power for the motor and may also be called the battery pack or rechargeable battery. Similar Dyson cordless models, including the DC31, DC34, DC44, and DC45, use a similar battery removal process, but always match the replacement battery to the battery already installed.

What you need

Parts

Dyson DC31, DC34, and DC35 Type A Battery
$49.99

5

Optional

Type A

View
Dyson DC31, DC34, DC35, and DC44 Type B Battery
$49.99

5

Optional

Type B

Tools

1. Step 1 Check the symptoms and prepare safely
  
  Edit
  Pull the trigger and check whether the vacuum runs.
  
  A dead battery commonly causes no response from the trigger and no green charge light.
  
  Disconnect the charger and remove the vacuum from the charging area before working on it.
  
  Don't open, puncture, crush, heat, or cut into the battery pack.
  
  If the battery is swollen, hot, leaking, or damaged, stop and keep it away from flammable materials.
  Ask FixBot
  
  Add Comment
  
  1024
2. Step 2 Open the vacuum body
  
  Edit
  Press the top lever to release the front assembly.
  
  Separate the vacuum into two pieces.
  
  Pull the air filter out of the front of the vacuum.
  
  Let a washed filter dry completely before reinstalling it, as moisture can damage the motor.
  Ask FixBot
  
  Add Comment
  
  1024
3. Step 3 Remove the battery screws
  
  Edit
  Use a Phillips screwdriver to remove the front battery screw from the opening near the filter.
  
  Use a Phillips screwdriver to remove the rear battery screw from the back of the handle.
  
  Keep the screws separate, as the longer screw goes in the rear hole during reassembly.
  Ask FixBot
  
  Add Comment
  
  1024
4. Step 4 Remove and identify the battery
  
  Edit
  Slide the battery out through the bottom of the handle.
  
  Identify the old battery style before ordering or installing a replacement.
  
  Choose a Type B battery if the old battery has a tab on top.
  
  Choose a Type A battery if the old battery has no tab on top.
  
  DC31, DC34, DC35, DC44, and DC45 models may look similar, so match the replacement to the removed battery.
  Ask FixBot
  
  Add Comment
  
  1024
5. Step 5 Install the replacement battery
  
  Edit
  Insert the matching replacement battery up through the bottom of the handle.
  
  Push the battery in until it sits flush in the handle and the screw holes align.
  
  If the battery doesn't seat correctly, remove it and recheck whether the vacuum needs a type A or Type B battery.
  Ask FixBot
  
  Add Comment
  
  1024
6. Step 6 Reinstall the battery screws
  
  Edit
  Insert the longer screw into the rear hole and tighten it with a Phillips screwdriver.
  
  Place the front screw into the front hole near the filter opening.
  
  Use needle nose pliers to start the front screw if it is hard to hold in position.
  
  Tighten the front screw with a Phillips screwdriver until it is seated.
  
  Don't over-tighten the screws, as the plastic housing can strip or crack.
  Ask FixBot
  
  Add Comment
  
  1024
7. Step 7 Reassemble and test the vacuum
  
  Edit
  Reinsert the air filter with its small tab facing up.
  
  Seat the lower end of the front assembly into the main body.
  
  Press the top of the assembly together until it clicks into place.
  
  Pull the trigger to confirm the vacuum runs.
  
  Place the vacuum on the charger and check that the green charge light comes on.
  Ask FixBot
  
  Add Comment
  
  1024
8. Step 8 Handle the old battery and troubleshoot
  
  Edit
  Recycle the old battery as lithium-ion e-waste according to local rules.
  
  Don't cut the wires or open the battery case, as the cells and circuit board are soldered inside.
  
  If the vacuum still won't run or the green charge light still won't come on, remove and reseat the replacement battery.
  
  Confirm that the replacement battery matches the old type A or Type B battery.
  
  If the problem remains, stop using the vacuum until the battery and charging system can be checked.
  Ask FixBot
  
  Add Comment
  
  1024

Conclusion

After installing a new battery, charge it to 100%, and keep charging it for at least two more hours. Use the vacuum until it shuts off because of a low battery, then charge it uninterrupted to 100%.

Charge the new battery fully before regular use, and keep the filter clean and dry for best vacuum performance. Take your e-waste to an R2 or e-Stewards certified recycler. Repair didn't go as planned? Ask our Answers community for help.

Cancel: I did not complete this guide.