Holding charges is not the same as total capacity. No refreshing can increase the ability of the battery to hold the charges for longer period. It rather depends on the used materials, quality etc. These better types also don't come with miracle figures of capacity.
Refreshing is only trying to 'kill batt memory' ....doesn't revive dead batteries. Fully charge and use it till flat...then go for refresh. It can take a few hrs to discharge and recharge. Batteries life can be extended abit more... but does not give u a brand new life.