It's a practical replacement battery, which can work with many power tools. With large capacity, it can work for a long time.
Features: Large Capacity: with 4000mAh battery capacity, allows long time working. Intelligent Core Protection Panel: protection from short circuit, internal overheating, overloading and overcharging, safe to use. Impact-resistant Outer Case and Shock-absorbing Inner-liner: can well protect the battery. No Memory Effect: can be charged or discharged at anytime anywhere for maximum working efficiency. Compatible With Dyson Models: Dyson V8 Absolute / V8 Animal / V8 Animal Exclusive. Suitable for working with power tools, vacuum cleaner, hand-held sweeper, etc.