One=Two Battery features unique shape to let two batteries to operate as one whenever their power levels tend to be running down. The cause why one=two battery is a good concept because batteries are usually harmful to our environment. Do you know that One particular cubic meter of soil can be polluted by only a single D-size battery? Battery is made up of toxic material, however it seems in which it’s been a usual practice regarding users with powered-battery devices to replace a low-energy battery using a new one in an instant while actually there’s still a lot of energy stored in the old one. Keeping this kind of concern in mind, these industrial designers have come up with One=Two Battery concept in which borrows the shape and purpose of a mechanical spring. This specific unique design allows your battery to be compressed when running minimal and combined into a single for greater power amount. In this way, the actual lifespan of a battery can be extended.