milwaukee m18 batteries and charge

[applemac]

both my batteries have stopped charging on the same morning? charger flashes green and red. left them indoors in the warm but still won't kick in. ones about 9 months old other ones about a year and a half. not hammered just normal use .
anyone had this? and tips to get them working. just got a new charger from the flea bay but not posting out for a few days

 

[telectrix]

2 failing at same time? could be a charger fault. also, li-ion have electronics in them . i repaired a AEG one. mosfet transistor was duff.

 

[shanky887614]

Best to keep them say in an airing cupboard over night then try in the morning.

I had the samd issue with some of my makita batteries. Li-ion don't seem to like the cold