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My Dyson SV04 does goes on and off when I try to vacuum but stays on if I just turn it on without vacuuming anything. I think that it’s a bad battery. I need to know how to take apart the battery pack and replace the individual cells.
If it runs on lithium it can be quite dangerous to rebuild if you don’t know what you’re doing or don’t use the proper tools. If it runs on something like nickel metal hydride (NiMh) or nickel cadmium (NiCad) you should be able to rebuild it fairly easily. If you can get a model number wither from the machine or the battery pack that would be helpful.
Replacement Vacuum Cleaner Batteries for Dyson SV04 Battery Type: Li-ionVoltage: 21.6VCapacity: 3000mAhColor: BlackWeight: 340gDimensions: 132 x 114 x 88mm