Certain button-cell batteries, like those labeled “alkaline manganese, silver oxide, zinc-air and mercuric-oxide,” contain trace amounts of intentionally added mercury.

• Button: So-called button or coin batteries (flat, dime-to-quarter-sized cells) used in watches and other small electronics can contain mercuric oxide, silver oxide, lithium and zinc and should ...

It is 50 years since pioneering surgeons performed the first implant of a battery-operated artificial device in a cardiac patient, writes BRIAN MAYE THE HEART pacemaker is a life-saving and life ...