DC 7 55V LED Battery Level Indicator 12V 24V 36V 48V 18650 Lipo Lithium 3 PACK Battery Button Watch 1.5V 376 377 AG4 V377 LR626 CR376 CR377 US A stopwatch for crew members of bomber aircraft Nickel casing with 10 x 1.55V Button Coin Cell Watch Battery Batteries AG3 SR41 LR41 LR736. GENERAL SPECIFICATIONSProduct: Watch Battery Only Battery Cell Composition: Silver Oxide Recommended Uses for Product: Watch Battery Count: 1 Cell Model Compatibility: Fit 3747 B Operating Temperature Range: 40 Degrees Celsius to +85 Degrees Celsius Shelf Life: 5 years Leakage Resistance: Anti Leak Design Movement Compatibility: Quartz Swiss or Chinese or Japanese Movement Water Resistance Compatibility: Suitable for 50m Water Resistant Watches Mercury Free: Environmentally Friendly (0% Hg) High Low Temperature Tolerance: Extended Performance in Extreme Climates SKU: 3747 B_K0064108