Crucial Vacuum High Capacity Black Vacuum Battery Fits Ontel Swivel Sweeper G1 & G2; Compare to Part # RU-RBG; Designed & Engineered 1 Crucial Vacuum 7.2V NiMH Vacuum Battery in Black Fits Ontel Swivel Sweeper G1 & G2,Replaces Ontel Swivel Sweeper Battery Part# RU-RBG Our battery is an extended life, lasts up to 1 hour and 20 minutes. Thats 3 times more than other batteries! Designed & Engineered by Crucial Vacuum The battery gets put into the charger and will charge up to 4 hours. If the normal charging time is exceeded the battery may fail.