SW = Low-Drain
battery with low discharge current
especially for analog watches
Type: Silver Oxide. Voltage: 1.55V.
Diameter: 4.8 mm. Height: 2.15 mm.
Also known as: D348, V348, SP348, SB-A6, 280-77, GP348.
This 348 / SR421SW is a rare silver-oxide cell normally used in watches.
The 348 / SR421SW is one of the smaller commercially available silver oxide cells.