The Laube Lazor Battery pack is quick chargable and require no tools. Quick recharge in less than 1 hour. Actual clip time will vary according to model and circumstances. Features double thermal safety to prevent over charging, built in switch protector and anti roll pull clip handle. 9.6v-4.8v DC. Made in the USA. Order extra battery pack for non stop clipping. 4,000-10,000 spm, 2,000-5,000 rpm, clipping time 1-2 hrs. 8oz. size 3-3/8x2".