Battery replacement filler

Introducing a practical container for tinfoil acting as a spare battery. This innovative replacement solution not only keeps your device usable but can also test a battery to see if it still works. Just put the real battery in alongside the other slots with the replacement and see if it turns on.**Important:** Before placing this replacement battery inside your designated area, please ensure that at least one battery is securely inserted with a connection between tin foil and metal. This ensures optimal functionality and readiness for your needs. SIZE:AA