Another way to save battery life is to reduce screen brightness. Some times the default setting may be to much, so decrease it a few points and your battery will last more.
I'm using my new VS7 for 2 weeks now, and I have to say I'm not dissapointed with the battery at all. With normal use (15 min talking, 10 sms, a few pictures taken each day) I have to recharge it after 3 days, wich I believe is good.