The other option is a field charger. I have gotten to the point that I almost never charge my batteries at home. I get to the field 20 minutes or so before I want to fly and the first thing I do is to charge my Receiver battery. I am still flying Ni-cads in the plane and I use 1000mah packs. Usually after three flights and then setting for a couple days before the next trip to the field, the pack is usually down about three lights on the voltwatch. This is still in the safe range, but I top it off prior to flying. I get a much better charge this way as my field charger is an intellegent charger that can tell when the battery is topped off. Neither the wall wart or the Accucyle charger can tell when the battery if topped off. With the wall wart it isn't to much of an issue as the current is very low. I have blown a new Ni-Mh transmitter pack on the Accucycle topping it off overnight. It was showing great voltage at the start of my first flight and within about three minutes, the transmitter alarm was going off. One cell had "vented" as they say. The field charger recognizes when peak charge has been achieved and gives you an alarm to let you know it's finished.

One thing about the Ni-cads is that they fall off peak just setting. If you fully charge one and then check it 12 hours later, there is a noticable drop in voltage. After 24 hours, I wouldn't try to fly without topping off again.

Don