Many flyers take their batteries down close to storage through a couple methods and then use a good aftermarket charger to precisely put the battery at storage level. If I am flying my Typhoon H, I will fly down till the voltage reads about 14.8 or 14.9 volts in a hover. Upon landing and a short cooling period I have found that the battery will rebound to right around the storage level of 15.2 volts which; is quickly obtained through the use of my Hitec X2 AC Plus. If I am flying my H Plus, the process is similar but due to the voltage difference of those batteries and the fact that the levels are in a percentage it is slightly different, I fly down to 48% indicated and again; the Hitec, once connected achieves storage in a matter of minutes and every now and then in seconds.
The down side of this of course is that you have to actually fly it down. Typically I will charge all batteries for a given job but if any are left over I just pop it up to about 3 feet in the back yard and let it do its thing. I have 3 H batteries approaching two years old with close to 300 flights and using these procedures they are still hauling the mail. YMMV.