European Directive 2006/66/EC.

European Directive 2006/66/EC basically outlaws the uses of Nickel-Cadmium Batteries in Europe.

Article 4(3) exempts portable batteries and accumulators intended for use in:

And even then the exemption for cordless power tools (CPT) is likely to disappear from 2016.

Batteries for Icom radios are not exempt, so for this reason Icom do not supply Nickel-Cadmium batteries inside the EEC.