FAQ Search Select a Category Cleaning Formulas Cleaning Tips Corporate Deep Cleaners FAQ Hard Floor Cleaners Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go Why choose Lithium Ion (1311 & 1312 series) batteries over NiMH (Nickel Metal Hydride) (1313 & 1315 series batteries for BOLT™? Answer: Suction does not fade The 1311 Series will run around 40 minutes with just the normal suction on and approximately 28 minutes if using on max suction. The 1312 series will run around 30 minutes on normal suction and approximately 20 minutes if using on max suction. The 1313 series will run for approximately 15 minutes (There is no suction setting for this machine) The 1315 series will run for approximately 20 minutes on normal suction and approxiamtely 14 minutes if using on max suction. Lighter/more compact A NiMH battery that offers 1.2 volts of energy has the same weight and size of Lithium Ion battery with an energy output of 3.7 volts. Long Storage Life NiMH batteries can lose 1 - 5% of their store powered each day. Lithium Ion batteries tend to retain their energy even after months of storage. Low Maintenance/No Battery "memory"