27A and LR721 / LR43 / LR44 / 23A share similar diameters but differ in thickness and capacity: 27A is 8.0 mm × 28.5 mm at 12V with mAh.
The holder decides: use exactly the size that closes freely — forcing a thicker or thinner cell damages both battery and device.
Both are available on our model pages with individual packing data; for a mixed assortment quote, contact our team.
