Hi Bill. The only thing not mentioned yet is that you will have a heavier battery pack and you need to re-adjust, or at least check, your center of gravity with the new higher capacity battery pack.

Hey, as said, the larger the better. I have 1200 mah 5 cell (6 volt) NiMH packs in my planes, but there is some controversy about how to charge the 5 cell packs in another thread... don't want to get into it here.

Also, remember, of course, that it will take considerably longer to charge that battery than the 600 mah pack will. A 50 ma wall wart charger (the one that came with your radio) will charge it just fine, but at 50 ma, it will take about 32 hours plus about 10% (3.2 hours) to fully charge it from completely drained. A field charger, or accu-cycle charger (or similar.. I have an ICE and Triton as well as Accucycle) will give you an indication of when it is fully charged, and will give you a choice of charge rates, that will speed up the charge rate... but never exceed .1C ( .1 times ( 1/10 ) the capacity or no more than 1.65 amps for your pack of choice) charge rate.

You are doing just fine.

CGr.