Renata's comprehensive assortment of over 40 different watch battery types, mostly of the silver oxide 1.55 V system, offers a suitable power source for any electronic device requiring an ultra-compact, long lasting, low voltage power source. Thanks to its close association with Swiss watch industry, Renata has first-hand knowledge of what a high quality watch battery must stand for: an optimized volume/capacity ratio dimensional precision and stability high capacity retention on storage (low self-discharge) excellent reliability due to a uniformly high quality level perfectly leak-proof due to a sophisticated sealing process constant availability Renata's professional expertise is worth having on your side. And in your watches. Renata Launches 0% Mercury Silver Oxide Batteries Renata is the first company in North America to market a full line of 0% Mercury silver oxide batteries. While 0% Mercury construction methods used by competitors have yielded lower capacity batteries, the new generation battery by Renata represents the first major overhaul of production methods and materials in decades. With the release of Renata's 0% Mercury battery system 4th quarter of 2010, performance and leak-proof quality have absolutely been perfected!