NiCd batteries and NiMh batteries have turned out to be cheaper these days.Looks like NiCd is being banned in most countries and they are being dumped to developing countries. Got two battery packs for my 2 cordless phones. Had to modify the connector for one of them. Also did cleaning of the keypads for one of them and it did work fine.
Looks like its difficult to get 600ohm transformer for the chatcord interface.