Glad you found it of interest !

I have just installed A123s as ECU batts. (9.9v) in both of my Hawks with JetCat 160SEs, work fine.

In my new Eurosport with a Wren XL 200, I have used twin A123s via a Powerbox Royal, a superb device. The digital display shows a rock solid 6.6 but the dial shows the batts are empty as they are set up for lipos, no real problem. .

That said, I read the new manual on the Royal and it makes the point that reducing voltage to servos from the maximum they can handle does improve servo life significantly. . They were really addressing 7 volt servos but I guess the same principle applies to servos rated for 5 cell nicads, which can peak at up to 7v.

Personally I always use a regulator to limit V to at or below 6v. Never had a servo failure, others tell me they never regulate, and never a failure, its an individual choice !

The powerBox Royal manual is on their web sit and it makes an interesting read.

It is interesting to note that Duralite is moving to A123 chemistry, see their web site for details.

Regards, David.