Fresh Stock and Long Listing SR 626SW 1.55v Watch Battery's Consists of 30-Piece Watch Battries Electro chemical System Metal hydroxide electrolyte. Zinc negative electrode. Silver-oxide positive electrode. SR626SW or 377 or 364 watch battery is one of the most widely used watch batteries. Available single or in packs of 30 batteries. 0% Mercury Do not contain Mercury and Lead. silver oxide batteries are ideal replacement batteries for button-type silver oxide batteries. Capacity 28 mAh Limited Period price Offer.