The four common sizes
Size 10 uses yellow, 13 orange, 312 brown and 675 blue in widely used hearing-aid packaging conventions.
Air activation
Zinc-air cells begin working after the sealing tab is removed and air reaches the cell. Remove the tab only when the battery is ready for use.
Do not match by case alone
Some alkaline or silver-oxide cells share dimensions with hearing-aid sizes. They are not automatic replacements for the zinc-air system.
Decision boundary
This guide narrows a battery decision but does not override the device manufacturer’s current manual or safety instructions.
Sources
- International Electrotechnical Commission — IEC 60086-1:2026 — Primary batteries, general requirements
Primary-battery nomenclature, form, fit, function, terminal and electrochemical-system framework.
- Duracell — Battery chemistry technical bulletins
Alkaline, lithium-manganese-dioxide, zinc-air and silver-oxide chemistry behavior.