I too have the DX7 with several AR7000 receivers (of course, in several aircraft). When I started using this fine radio, I decided to go with 6 volt packs and at least 1200 mah packs. I have a few aircraft that have a pair of these batteries installed. And in every situation, I have a voltwatch installed.

As Steve, my setup saved my Venus II. One of the pair of batteries went bad during the third flight of the day. I never noticed it during flight because I was using two batterypacks. When I landed, I checked my batteries.. which is what I normally do after each flight. The one pack measured about 1 volt, the other was about still in the green, measuring, if I recall correctly, about 5.9 volts.

The main reason, though, that I use 6 volt packs is because I do not want to fall below that critical threshold voltage that caused the RX to "re-boot". This just can't happen with 6 volt packs because the point at which they require recharge is well above that threshold, but it is possible to reach that threshold using 4.8 volt packs. So, I simply avoid the problem by using the 6 volt packs.

CGr.