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The Dyson V8 Animal is a cordless vacuum equipped with powerful suction that can last up 40 minutes on one charge.

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Aftermarket Rechargeable Batteries (Safety and Effectiveness)

I've read that replacing a cordless vacuum battery with an aftermarket alternative can be risky.

How does one determine if an aftermarket rechargeable battery will be safe and effective?

I'm wondering about aftermarket rechargeable batteries in general and rechargeable vacuum batteries in particular.


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It most likely would be risky as you don't know the quality of the cells in the battery pack. For example, you could buy cells from Samsung and know they would be of great quality, but you could also buy a nice cheap pack of cells on Ebay, but you have no idea on their quality, lifespan and true capacity. What you could do instead is find a dissassembly video and have a go at replacing them yourself. That way you can replace the current ones with genuine, good quality cells.

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There is danger regardless. Reworking Li-Ion pack is risky. The packs are usually difficult to open, and mistakes in rework can lead to fire and explosion. Depending on the BMU, removing a cell could lead to a permanent failure, where the pack will refuse to charge or discharge. Then you're stuck buying a new pack, anyway.

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