The Replacement Li-ion Battery Pack for Leica Lino L4P1 Multiline Laser is a rechargeable battery pack that provides construction lasers with extended operating time. Designed to work with the Leica Lino L4P1 Multiline Laser, it offers a rated capacity of 5.2 ampere-hours and runs at 3.6 volts. This Li-ion battery pack replaces the existing battery of the compatible instrument or can be used as a spare to ensure continuous and uninterrupted operation.