RE: Power Expander w/FS and A123
I just ran a charge test with 2 batteries with parallel switches into a single receiver and it was no problem.
I plugged each A123's 2 wire 6.6v output through a charge switch then into a receiver. The setup included (2) A123 batteries, (2) charge switches, plugged into 2 slots in a single Hitec receiver that I had on my bench. To make sure each circuit worked, I plugged a Voltwatch into another slot on the the RX, and turned on each battery one at a time to make sure each one was alive and connected properly, then shut off both switches.
With both switches off, I charged the first A123 battery thru the loose 3 wire JR style balance plug, with the FMA charger. It did a very brief fast charge (it was 95% full already) and then completed a "safety" charge until it was at 100%. I then charged the 2nd battery the same way. No problem. Nothing got even slightly warm and the charges all terminated "normally".
Ok....I now know I can charge them each with no issue it seems, using conventional, parallel switches between the batteries and receiver. However, I don't know how the failsafe switch operates between the batteries and receiver. Since it is always drawing a small amount of power, I assume it might behave a little bit differently with some possible connection always being alive between the 2 batteries.
With the success charging thru the parallel standard switches, do you think I should stick with that kind of switch, or would I likely be equally successful with your failsafe switch?