About this item 🚩 1. This is an battery adatper, but not a battery. It just converts one battery model(for Makita) to another battery model(for Dyson Type A), won’t consume battery’s electricity. So the vacuum cleaner’s working time only depends on your Mak.. battery’s capacity. 🚩 2. Only works with Dyson Type A vacuum cleaners: 917083-01, 17083-2811, 18172-01-04, 17083-4211, 18172-0201, 917083-03 (✖Not fit the Part #: 17083-04). ✖ NOT FOR TYPE B ✖ 🚩 3. The adapter’s bottom slot is only suitable for Makita 18V Lithium ion batteries. The usage feeling of vacuum cleaner will be better with a battery of more than 4 Ah. 🚩 4. Convert for Makita Battery to type A battery: Our converter can convert for Makita 18V Li-ion battery to replace for Dyson Type A battery. If you have the Mak.. battery in your home and type A vacuum cleaner, our battery adapter will be a good choice. 🚩 5. Please be careful to confirm your vacuum cleaners model whether is Type A model. Our adapter only for Dyson TYPE A.