With a fully charged battery, you can use the Wahl 1911 Lithium Pro LCD for 100 minutes, which is useful if you want to give multiple people haircuts in one session. You can use these hair clippers to create haircuts of various lengths. For a close shave with a shaving length of 1 millimeter, use the hair clippers without the comb attachment. For a longer length, use 1 of the 6 comb attachments, which can shave between 3 and 25 millimeters. The display clearly shows the remaining battery percentage, so you won't be in for any nasty surprises. If you don't have time to charge the hair clippers, you can just use them in wired mode. When you're done shaving, you can use the cleaning brush to remove any remaining hairs from the trimming head.