SR754W battery: equivalents & specs
The SR754 is a tall 1.55 volt silver-oxide button cell, 7.9 mm across and 5.4 mm high, holding 70 to 80 mAh. The high-drain version sells as the 393 (SR754W) and the low-drain watch version as the 309 (SR754SW); both share the exact same case.
Same battery, other names
Every code below is the exact same cell as SR754W. Any of them will fit and work identically.
Compatible replacements
- LR754 / AG5: Alkaline same-size cell with lower capacity and sagging voltage.
Buying and replacement notes
This size is unusual in that the high-drain 393 is the more commonly stocked number, because the cell's height and capacity attract instrument and device makers, not just watchmakers. For a simple analog watch the 309 is the tuned choice; for anything with motors, lights or measurement electronics the 393 is right. The alkaline AG5 fits but gives up about a quarter of the capacity and all of the voltage stability.
Commonly used in
Need a replacement?
Shop SR754W 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.