Publisher: UMLIFE. 10s delay auto off (Settable)4. P is the type of battery: P = lead acid, L = lithium, F - lithium iron phosphate.4 - Press the setting button to select P, L or F.5 - The number 01 is the number of cells or battery types For lead acid batteries, P: 01 = one 12v battery, 02 = two 12v batteries, etc.