From a Microsoft Press Release: REDMOND, Wash. July 1, 2010
Microsoft Corp. today announced a new technology aimed at improving the battery installation process called InstaLoad battery installation technology, which allows users to easily install a battery without regard to positive and negative polarity. Never again will people have to squint to see battery installation diagrams — the device simply works regardless if the battery is installed positive-side-up or positive-side-down. InstaLoad is a patented battery contact design now available for license by third-party device suppliers, with companies like Duracell already lining up to endorse the technology for use in their own products.
Product Applications and Differentiators
InstaLoad technology can be incorporated into devices that require frequent battery swap-outs, are used in less-than-ideal environments or use several batteries. Industries that could greatly benefit from this type of timesaving technology based on their environments include law enforcement, military, construction, outdoor sporting and camping. In addition, users of devices with multiple batteries and frequent battery swap-out — including battery chargers, digital cameras, camera flash units and toys — could also benefit.
Unlike existing electronic solutions designed to address battery-polarity installation, InstaLoad is a mechanical invention that does not drain battery power or require expensive electronic circuitry. InstaLoad battery contacts can be cost-effectively designed into most battery compartments, as it usually requires replacing existing battery contacts with the patented InstaLoad contact design. The technology is compatible with popular off-the-shelf batteries used in products such as flashlights, toys, battery chargers, lighting and most other battery-operated consumer electronic devices that use CR123, AA, AAA, C or D size batteries (disposable or rechargeable) or similar barrel-type battery form factors.
You can read the rest of the press release here. The InstaLoad Technology site is here.