Hearing aid battery quick reference

All four standard hearing aid battery sizes at a glance. The tab color on the package and battery is the fastest way to match your device.

Size	Tab color	IEC name	Diameter	Height	Capacity	Typical runtime	Aid style
10	Yellow	PR536	5.8 mm	3.6 mm	~90 mAh	3–7 days	IIC, CIC (smallest aids)
312	Brown	PR41	7.9 mm	3.6 mm	~175 mAh	5–10 days	ITC, RIC, RITE, mini BTE
13	Orange	PR48	7.9 mm	5.4 mm	~310 mAh	10–14 days	BTE, full ITE
675	Blue	PR44	11.6 mm	5.4 mm	~600 mAh	10–20 days	Power BTE, cochlear implant

Key rules

Color-coded packaging — yellow, brown, orange, and blue tabs are standardized across all brands (Rayovac, Energizer, Duracell, Phonak, etc.).
Wait 1 minute after removing the tab before inserting the battery — this activates the zinc-air chemistry fully and extends runtime.
10 and 312 look identical in diameter (both 7.9 mm for 312; 5.8 mm for 10) — always check the number not just the size by feel.
312 and 13 share the same 7.9 mm diameter but different heights — they are not interchangeable.
Open the battery door at night to extend battery life — prevents unnecessary drain.