I don't know your charger,but a lot of chargers have a 'capacity' setting on them.Go thru your menu and make sure the charge capacity is set at 100%,or better yet 110%.It is possible that it is only at 50% now and that is why you are getting only 700 mah.Also,as joe of loath said,it may take a few charges,but i would imagine that they would be taking more than 700 mah even if they are new.