VARTA Type V392
VARTA Type V392 is a small primary silver-oxide button cell battery used where a stable and compact power source is required. It is a 1.55 V cell measuring 7.9 mm in diameter and 3.6 mm in height. In VARTA's documentation, it is also listed as IEC SR41 and Type No. 392.
This type of battery is designed for equipment where space is limited, but where voltage must be steady and reliable. Silver-oxide cells are known precisely for providing a constant voltage over their service life, which is an important feature in small precision products.
VARTA specifies the type with the order designation 00392 101 111. This is the reference typically used to ensure that the correct button cell is ordered for replacement or stock.