Well i charge my battery's on Fri. night to prepare for Sat. But have flown for a couple weeks on a 600 4.8 pulling 5 servos, all DS821'2 and had no problems. I put a Voltwatch on mine just because i think they are cool looking. Late in the evenings espesially. The little lights bilinking across when
you turn on the switch, is really bling for me but it also lets me know when i need recharging If i get down to third light i go home lol. But mine has only gotten that low once.