I've had the T15 for two months and have charged each battery maybe three times. Yesterday after one of the batteries died, it would no longer charge. (i.e. blinking red light)  I sat on hold for ten minutes to Festool repair and then called back and left a message asking for a return call, which I didn't get.  Booo!
I have : Trion jigsaw, Kapex, MFT, Domino, fifteen systainer/sortainers and an Installers level (which came with a defective vial light- still haven't got a replacement)
				
			I have : Trion jigsaw, Kapex, MFT, Domino, fifteen systainer/sortainers and an Installers level (which came with a defective vial light- still haven't got a replacement)