Maxell CR1220 3V Lithium Coin Cell Watch Batteries (5-Pack)

Adafruit Assembled Data Logging Shield for Arduino

RasClock 4.0 RTC for Raspberry Pi

Eunicell CR1220 5012LC Lithium Blister Pack 3V 3 Volt Coin Cell Batteries (20 pcs)

CESS Amplifier Terminal Connector Binding Post Banana Plug Jack Socket Panel/Chassis Mount - Length:45mm / 1.8" (LW) (20 Pack)

Maxell SR920SW Watch Battery Button Cell 371- Pack of 5 Batteries

Energizer 395 / 399 Silver Oxide Zero Mercury (SR927W / SR927SW) 15 Batteries

Energizer 395 / 399 Silver Oxide 5 Batteries (SR927W / SR927SW)

Energizer 2032 Battery CR2032 Lithium 3v (1 Pack of 5)

5 Maxell SR626SW 377 Silver Oxide Watch Batteries

10 Energizer 392/384 Multi-Drain Batteries (Replaces LR41)