Is it permissible to mix different types of batteries in the same cartridge when using night vision goggles?

Mixing different types of batteries in the same cartridge when using night vision goggles is not permissible due to the potential risks it poses to the device's operation and the safety of the user. Different battery chemistries, such as alkaline, lithium, or rechargeable nickel-metal hydride, can have varying voltage outputs, discharge rates, and internal resistances. These inconsistencies can lead to uneven power distribution, which may damage the NVG or result in malfunction.

Furthermore, using incompatible battery types could create a risk of leakage or overheating, posing safety hazards. Manufacturers typically recommend using the same type and brand of batteries to ensure optimal performance and reliability. This practice helps maintain the integrity of the night vision goggles and ensures that they function correctly during operation.