I was searching a bit about one of the things most have to buy: batteries. Fortunately the NP-50 is a common battery and it seems there are some other brands that use them with another names, like Kodak KLIC-7004 or Pentax D-Li68, so they can be found very cheap. The problem is quality. Sometimes stickers say 1400 mAh (I even saw one claiming 2300 mAh) and last less than those with only 1000 mAh plus a bad quality one can even get in fire (at least these are only 3.7 V and that means no different cells in series, wich should be safer). Any good/bad experiences with aftermarket batteries?