timothy from the now-you-can-charge-in-the-bathtub dept.
judgecorp writes "Steady progress on inductive wireless charging. There are now certified prototypes of chargers for Blackberry and iPhone devices that meet the Qi specification of the Wireless Power Consortium, which was announced last year. The spec has advanced from version 0.95 to 1.0, too."
In any formula, constants (especially those obtained from handbooks)
are to be treated as variables.