A13 and A10 / A312 / A675 share similar diameters but differ in thickness and capacity: A13 is 7.9 mm × 5.4 mm at 1.4V with 300 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.
