5 x Energizer 379 Watch Batteries, 1.55V, equivalent SR521SW, 521 | Best Buy Canada
1.5V Alkaline AG Series Button Cell Battery Ag0 LR63/179/521 LED use, 1.5V AG Button Cell Battery Ag0 LR63/179/521 LED Battery - Buy China 1.5V AG Button Cell Battery Ag0 LR63/179 LED light