LR754 battery: equivalents & specs
The LR754 is a 1.5 volt alkaline button cell, 7.9 mm across and a relatively tall 5.4 mm, also known as AG5, LR48 or 193. The silver-oxide SR754, sold as the 393 or 309, is dimensionally identical and delivers more capacity with steadier voltage.
Same battery, other names
Every code below is the exact same cell as LR754. Any of them will fit and work identically.
Compatible replacements
- SR754 / 393: Silver-oxide equivalent (393 high drain, 309 low drain) with about 80 mAh in the same case.
Buying and replacement notes
The tall, narrow AG5 shows up in small medical devices, penlights and some larger watch movements. Its extra height gives it more capacity than the flatter AG cells, around 60 mAh. The silver-oxide 393 raises that to roughly 75 to 80 mAh and keeps output flat, which matters for instruments that take readings. Match the height carefully: the AG5 shares its 7.9 mm diameter with four other AG sizes.
Commonly used in
Need a replacement?
Shop LR754 batteries on Amazon →⚠️ 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.