| Specification | Details |
| Model / SKU | Philips LR621 / AG1 (Equivalent to SR621SW / 364) 1.5V Button Cell Battery |
| Chemistry | Alkaline Manganese Dioxide (MnO2) / Non-Rechargeable Primary Cell |
| Nominal Voltage | 1.5V DC |
| Capacity | Approx. 13mAh - 15mAh (High-reliability micro-drain tier) |
| Physical Dimensions | Diameter 6.8mm x Thickness 2.1mm (Standard 621 ultra-compact form factor) |
| Operating Temperature | -10°C to +50°C (Standard environmental operational range) |
| Deployment Utility | Command Station Miniature Timing Circuit Backup, Compact Micro-Peripheral State Retention, and Specialized Indicator Asset |
