9V Lithium Batteries
These disposable 9V lithium batteries are intended as a direct replacement for alkaline batteries of the same type. They provide approximately the same nominal voltage, along with a much denser charge for longer run times and a very long shelf life. They are also considerably lighter than their alkaline counterparts.
The battery case is the standard 9V rectangular configuration, although the case may be approximately 3mm shorter than a carbon-zinc battery case. Contacts are both top-mounted, with one female and one male contact to prevent polarity reversal. This battery style, also known as PP3, MN1604, “square” or “transistor” is commonly used in radios and smoke, fire and carbon monoxide detectors as well as musical devices, toys, radio controllers and games.