Potential problem with Lithium D Cells

There are lots of them on ebay, one of the cheaper listings:

https://www.ebay.com/itm/315986591921

Like the 9V Lithium re-chargables that use a USB source as a charger the fly in the ointment is that the lithium cell inside has a switching supply to both handle charging and outputting 1.5 volts (since Lithium Ion cells are usually more like 4 volts the voltage has to be pumped down with a switcher).  Of course this creates RF hash which precludes using these internally in a radio like the Sony 2010.  I first found out about this on the Sony 2001/2010 group, a member of the group was having sensitivity problems on the AM band and below.  When he replaced the lithium D-cells the problem went away.  They are kinda expensive anyway.

Everyone hates NiCd or Nimh but at least those cells don't generate RF hash !

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm