
This tiny coin cell battery holder is perfect for compact portable or wearable projects. It accommodates one 20mm coin cell, such as the widely-used CR2032, to deliver a 3V nominal output.
20mm coin cells are prevalent in devices like keychain lights and remotes, making them easy to find and cost-effective. The holder offers three LED modes: quick flashing, slower flickering, and static on, easily cycled through with the press of a button.
Originally designed for LED jewelry, this battery holder can also support other projects requiring simple cycling. Crafted from durable plastic, it snaps open and closed, with the option to tape for added security. It features a soft on/off/mode switch for convenience. Note: Does not include CR2032 coin cells.
| Brand | Adafruit |
| Model | 4891 |