Each TyreCheckers LED Alert Cap has 2 button batteries inside at $1.50 each.
The 'Replacement TyreCheckers Button Batteries 4pk' will come with 8 individual batteries.
G10 Battery is a coin cell shape alkaline battery with a nominal voltage of 1.5V.
It provides maximum power and continuous energy to your device for applications like toys, calculators, scales or other precision electronic devices.
G10 Battery Specification: