Tenergy's 40 pack 1.5 volt LR41 button cell battery is ideal for electronics such as thermometers, watches, lasers pointers, medical devices, calculators, small radios, key fobs small toys, and portable electronics. A low internal resistance enables these button cell batteries to provide long lasting energy for small electronics. These lr41 button batteries are designed with improved anti-leaking and last for up to 5 years when properly stored. Made from non toxic metals, these LR41 batteries are enhanced with an anti-leak design and built to last. Replaces silver oxide batteries and is similar size as AG3 LR41 1134SO 125/D LB192 A63 247 247B 247D 280-13 280-18 325 LB41 392/2 392/384 392A 392BP 392X 736 92A AG-3 AG03 AG3 ASG3 CX41 D384 D384/392 D392 E392 G3 G3A GP192 GP392 GP392-A1 GP92A K L736 L736C L736F L736H L736S LR41 LR4192 LR41H LR736 R384/10 RW47 RW47S RW87 S736E S736S SB-A1/D1 SB-B1 SG3 SP384 SP392 SR41 SR41/SW SR415W SR41SW SR41W SR736 SR736PW SR736SW SR736W TR41SW V36A V384 V392 V3GA. Tenergy's alkaline button cell LR41 / AG3 batteries are designed for 1.5V applications. They're designed for use in thermometers , toys , watches , children's interactive reading books , HHA sight, bore sight, Sightmark, MidTen Boresighter, IQ Sight, IQ Bow Sight, Laser Boresigheter, TRUGLO, Nite Ize, Sightmark 3030 30-30, Bow Sight Light, Rifle Bore Sighter, Streamlight Nano light mini flashlight, hearing aids, ornaments, and Tru Glo.