You are right with that 29 volts on a healthy 24 volt NiMh Dan, but that's not under load of course. My concern on the LiFePO4 is that the voltage will hold up under load quite well. There's been some motherboard failures on the Lafree's Panasonic units and that's the main cause of them being scrapped in fact.
The other concern is that the unit does cut out on excess temperature according to the makers, though it's never happened to me in the past.
I have no hard numbers on the components, though the electrolytics look like the marked types, and you might be able to see the coding on the mosfets.
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