1:Easy installation: When the device requires 3 batteries, purchasing them separately can easily cause installation errors and damage to the device.Actual 4.5V 100mh. with durable and reliable performance, the highest capacity of this type 2:Superior Performance:Each battery is tested and then automatically packaged together by a machine, completely cutting off short circuits and reversing for easy use,We have combined threeSR626SW batteries together, which will completely solve these difficulties and save you time. 3:Durable Power: Our batteries have superior capacity to provide long-lasting power for your device.A shelf life of about 5 years, no leakage, no rust, ensuring that the battery is in an efficient state 4:Safety Design:Each battery is packaged inside a blister, which is much safer than buying a battery separately, and children will not easily peel it off.This is in compliance with the latest laws 5:Widely Used:Works with all bore sight laser cartridges which require to stack 3 pieces of AG4 LR626 377 SR626 batteries.The product contains 15x 3SR626SW batteries. If your device uses individual sr626sw/lr626/ag4 batteries, you can unpack the outer package.