I have one of those sealed gel type batterys you are talking about and i only need to charge it once every couple of week's i use the battery to charge my RX and TX packs on the way to the field as i normally go spur of the moment and still have plenty of charge to use the starter lots. I presume you are talking about using a fast charger like the supernova or triton charger both of these are ideal as i can charge my RX and TX in an hour each from flat but i would not reccomend charging over 1c with the RX and TX packs, also make sure that you charge direct to the packs not through switches or the TX charge point as i'm not sure how much current they can handle.