Thanks for the info guys. I'm using Energizer 2500ma nimhs ($15 at Walmart) to power my TX so I don't have to keep buying batteries. These things are the best thing since sliced bread...or the AA. However, I'd still prefer to run one TX as a charger only via a seperate power source. That way the charges don't get longer as the batteries get weaker in the TX. Thanks again for the info and link and I'll read up on it.