Size 13 (orange) battery: equivalents & specs
Size 13, tabbed in orange, is the workhorse battery for behind-the-ear hearing aids: a 1.45 volt zinc-air cell, 7.9 mm across and 5.4 mm tall, with 280 to 310 mAh. Expect six to fourteen days per cell in typical use.
Same battery, other names
Every code below is the exact same cell as Size 13 (orange). Any of them will fit and work identically.
Compatible replacements
- Size 312 (brown): Same 7.9 mm diameter but thinner; fits different aids, not interchangeable despite the shared width.
⚠️ Button batteries are dangerous if swallowed. Keep them away from children and pets and dispose of spent cells promptly.
Buying and replacement notes
The 13 and the 312 share their 7.9 mm diameter and are the two most confused hearing aid sizes; the 13 is taller (5.4 versus 3.6 mm) and holds nearly double the energy. Your aid takes exactly one of them. The orange-versus-brown tab is the fastest check at the pharmacy shelf. As with all zinc-air cells, peel, wait a minute, then insert.
Commonly used in
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Shop Size 13 (orange) 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.