The radio cost includes the cost of the Power Module. How long does it take recover this in the money saved on battery purchase?
It depends how much the radio is used each day. With heavy usage the payback time is shorter. It also depends on battery cost, which can vary quite a bit from country to country, and depends on the price of the radio to the user. In wealthy nations the radios will be sold through normal retail routes with the final price including all the mark-ups of each stage of distribution. In developing countries, we hope the radios can be delivered to the end user in the most efficient way possible with minimum add-on costs. The burden of buying batteries is then minimal, even in areas and societies in which the price of a battery can be a significant part of a daily wage.
