High-Capacity Rechargeable Li-ion Battery: This 4000mAh, 22.2V lithium-ion battery provides long-lasting power for compatible Dyson vacuum cleaners like the DC31 and DC35 (excluding Type B models).

Premium Quality and Eco-Friendly: Made with high-quality lithium cells through a lead-free SMT process, meeting environmental protection standards. No memory effect, allowing convenient charging and discharging.

Safe and Long-Lasting: Equipped with overcharge and overdischarge protection to extend the battery's cycle life. Self-discharge is minimized during storage for prolonged usability.

Compatible Models: Designed as a replacement battery for Dyson DC31, DC35 (except Type B), and models with part numbers 917083-01, 17083-2811, 18172-01-04, and 17083-4211.

Warranty and Support: Backed by a 30-day money-back guarantee, 12-month limited warranty, and 24/7 customer service from the manufacturer, Powerextra.