The Dyson V10 SV12 Sv27 genuine battery has been tested on boost mode and is suitable for handheld use. This electric cordless battery is designed specifically for the Dyson Cyclone V10 model, providing reliable power for your vacuum cleaning needs. The grey colour and single pack make it easy to identify and compatible with your Dyson vacuum cleaner. Trust in the Dyson brand for high-quality and efficient home cleaning solutions.