3.6 V 2/3 AA Tadiran Battery, 1.5 Ah. All µCache units ship with a battery included. The battery used in the µCache is somewhat unique and can be hard to find so it is recommended to have a spare on hand. This model can be purchased at other retailers like Amazon or Mouser (Mouser Part number is 667-TL5955S). We use Talidran batteries, but if you wish to source a battery of a different brand please see the specifications listed.
Rechargeable/Non-Rechargeable: Non-Rechargeable Battery Size: 2/3AA Output Voltage: 3.6 V Capacity: 1650 mAh Battery Chemistry: Lithium Thionyl Chloride (LiSOCl2) Minimum Operating Temperature: - 55 C Maximum Operating Temperature: + 85 C Brand: Tadiran Batteries