Name that Thermal Charger-1980's

[bish]

OK, a recent facebook thread got me trying to remember what was the name of the thermal charger i had in the 1980's.

No pictures (obviously!) blue metal case powder coated light blue which attached with four phillips screws to a magnolia coloured chassis. LCD digital temp display on the face and a red start button. 12V powered, NiCd only.
It wasn't Demon or Wasp, but maybe of that era/size brand.

Any ideas? Grateful for any thoughts!