My ryobi 14.4 v cordless, when i put the battery in the charger the yellow and green light both stay on and does not charge. this happens with both chargers and battery packs

If i have this striaght two chargers and the green and yellow lights are on and the batterys will not charge and there 14.4v batterys correct . Then the batterys must be no good unless bolth chargers are bad and have the same problem witch is exterimly unlikely. most likely the batterys and are NG.They don't do well if left in cold condutions or hot for that matter but cold is worse . 14.4 V is is an unasul size and if its not a lithuim ion battery its going to be obisilete and unavaible soon if not already . Ihad the same problem with my RYOBI 7.2 volt can't get the batterys for under a 100 dollars thats one and a speical order i paid 39 dollars for the gun and 2 batterys . They make the money off resale on batterys . And you can do far better then RYOBI for a screw gun now a days