Green’s Dictionary of Slang

electric; thus lecky blanket, lecky kettle.

1913		Sport (Adelaide) 4 Oct. 4/3: Art was a Jonah [...] with his ‘leca light’.
1999		Riding Online No. 64 Sept. 🌐 Or it may require the dexterity to hit the button on the lecky kettle on the way through to the back-room office to boot the Mac into life.
2001–2002		T. Shelby ‘Feline Tales’ Cats of Aus. 🌐 Naturally she hogs the ’lecky blanket in winter!!!
2012		(con. 1980s) I. Welsh Skagboys 153: Ah switch on the lecky fire.