Provided are methods of preparing an electrochemically active cathode material including the steps of (a) combining an alkali metal-containing layered nickel oxide having a formula A1-aNi1+aO2, wherein A comprises an alkali metal and 0 < a ≤ 0.2, with an...

An alkaline electrochemical cell having an anode including electrochemically active anode material comprising at least 3.3 g of zinc or zinc alloy, a cathode including electrochemically active cathode material comprising 10 g to 11.5 g of manganese dioxide...

Batteries with a safety mechanism adapted to protect against tissue damage and/or electrolysis when the battery is exposed to an aqueous solution or a wet tissue.