If you use the wall wart charger, you will not overcharge anything. And, if you use any one of a number of field chargers, SIRIUS for instance, it will do a fast charge then switch over to trickle charge for maintenance.

If you take good care for your batteries, use them then recharge them on a regular basis, then they will last you longer than you will have your Nexstar (considering that you will probably move up to something with more of a challenge).

Cycling the NiCd's is a great idea, usually after the season is finished, or perhaps just before the season starts, will do the batteries good. Of course, you will need a cycler for that to do it right, but that's another issue. Keep them clean, and charge them when you are finished flying that day.

Get yourself a good extended range voltmeter (one that provides a load to the TX and RX batteries) so you can check the condition of the batteries after a few flights. You can probably expect to get about three flights before you need to check them, but I usually check my batteries after each flight just to make sure.

GO to: http://www2.towerhobbies.com/cgi-bin...&I=LXWW16&P=ML

This is a good and easy priced voltmeter that will load the batteries.

DS.