Size 312 (brown) battery: equivalents & specs
Size 312, tabbed in brown, is the most popular hearing aid battery today: a 1.45 volt zinc-air cell, 7.9 mm across and 3.6 mm tall, holding 160 to 180 mAh. It powers the slim receiver-in-canal aids that dominate current fittings, lasting three to ten days.
Same battery, other names
Every code below is the exact same cell as Size 312 (brown). Any of them will fit and work identically.
Compatible replacements
- Size 13 (orange): Same diameter, taller and higher capacity; fits different aids.
⚠️ Button batteries are dangerous if swallowed. Keep them away from children and pets and dispose of spent cells promptly.
Buying and replacement notes
Modern mini aids chose the 312 as the compromise between size and runtime, which is why it outsells every other hearing aid battery. Its shape is identical in diameter to the size 13 but 1.8 mm thinner; the brown tab is your guarantee. Streaming is the big variable in life expectancy: two hours of Bluetooth audio a day can cut a 312's week to four days.
Commonly used in
Need a replacement?
Shop Size 312 (brown) batteries on Amazon →Comparisons
⚠️ Keep away from children. Swallowed button batteries, especially 20 mm lithium coins, cause severe injury within hours. If a child swallows one, call the 24/7 National Battery Ingestion Hotline (US) at 800-498-8666 or poison control at 800-222-1222 immediately. What every parent should know.