1；Easy installation: When the device requires 3 batteries,Actual 4.5V 100mh. with durable and reliable performance, the highest capacity of this type. purchasing them separately can easily cause installation errors and damage to the device. 2:Long lasting Battery Life:Each battery is tested and then automatically packaged together by a machine, completely cutting off short circuits and reversing for easy use. This battery is suitable for kids toys, laser bore sights, , Keychain LED Flashlight, Electronic thermometer, Watches etc. 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 AG3 LR41 384 392 L736 192 SR41 batteries.The product contains 15 x 3LR41 batteries. If your device uses individual LR41 batteries, you can unpack the outer package.