Duracell is well known for manufacturing and marketing batteries. recently they launched the duracell powermat, which is a wireless charger for mobile devices. which brand development strategy did duracell use in this example?

The brand development strategy that the Duracell use in the given example above is the brand extension. A brand extension is being used as a way of increasing the sales in a company or business of which they make or develop new products under their trademark or their brand name.