Well, I would agree with you on their use, but even now, after several years of experience, however, IMO, I use them on each and every plane I put together. At $10.xx each, it's cheap insurance. Again, this IMO.. or in my opinion.

And, what you need is not a volt-ohm meter, but an ESV or Expanded Scale Voltmeter that is exclusively for RC use. It has an internal load that works with the voltmeter to give you a 'true' representation of the supply voltage under the simulated load of a typical RC receiver system.

I have several reasons why I use the Voltwatch on each and every plane I put together:

1. It's a fast and simple method of 'seeing' the current load that the battery is under and use that before and after each flight.
2. It's a fast and simple method of 'seeing' how the load effects the source in terms of binding controls. This can happen as a result of a hard landing, or from something breaking in transit to the field, or in flight. So, the voltwatch gives you an indication of a problem that is either developing or has developed.

And it is adaptable to either 4.8 or 6 volt systems by a simple flip of a switch on the voltwatch.

I find it worth while to have them. Some don't, but again.. Ford-Chevy issue here.. either you do or you don't.

CGr.