Design is important with any product, but with wallets design is almost everything. It determines the aesthetics, usability, and comfort of the thing in question, and if you get all those things right ...

I am unaware of any RFID systems designed specifically for coins, but TJS offers a solution for tracking jewelry that might also meet your needs (RFID Tracks Jewelry Sales, Inventory in Mideast).

The BR2477A coin cell in the poly-carbonmonofluoride, high-temperature lithium battery product line now offers two-pin horizontal, three-pin horizontal, vertical, and flat mount configurations. The ...