Battery packs are not created equally. Lithium ion batteries are extremely powerful which means it is crucial to use battery packs that are safe.  Our batteries have a very effective battery management system which is a top-level safety feature ensuring the battery does not overheat or overcharge and catch fire. This system also ensures that the battery is communicating properly with the rest of the machine. With cheaper third-party replacement packs, you have no idea where the battery and lithium cells came from and there were likely no quality controls to ensure safe manufacturing or consistency with the product.  Safety with batteries is imperative and we encourage all customers buy only genuine Dyson batteries as replacements for their Dyson machines.

Only by using genuine Dyson parts are you ensuring that your machine continues to work as intended. Dyson does not warrant the use of any 3rd party batteries or parts and assumes no liability for any such use of 3rd party parts or the injuries or damages caused by their use.