LR927 battery: equivalents & specs
The LR927 is a 1.5 volt alkaline button cell, 9.5 mm wide and 2.7 mm tall, also labeled AG7, LR57 or LR926. The silver-oxide SR927 in the same size is sold as the 395 for standard watches and the 399 for high-drain movements like chronographs.
Same battery, other names
Every code below is the exact same cell as LR927. Any of them will fit and work identically.
Compatible replacements
- SR927 / 395: Silver-oxide equivalent (395 low drain, 399 high drain) with about 55 mAh in the same size.
Buying and replacement notes
Like the LR920/LR921 pair, this cell carries both LR926 and LR927 markings depending on how the maker rounds the 2.6 mm nominal height; they are the same battery. Chronograph owners should note the 399 specifically: stopwatch motors pull brief high currents that the low-drain 395 and especially the alkaline AG7 handle poorly, causing resets and stalled subdials.
Commonly used in
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⚠️ 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.