If you use an auto peak detect charger, old batteries that have sat for a long period of time, especially NiMh will self discharge.  They get down to almost 0%.  The charger is then fooled into thinking it is like a 4 cell pack rather then a 6 or more.  The batts will act like they have a full charge but they do not.<div>
</div><div>Cycle the batteries a few times and they will regain some capacity.  You may need to put them on a trickle charge for an hour or so to get em started.  They most likely will not hold 3300mAh anymore.  Sound like a good time to upgrade to Lipo from HK!</div>