Bob Blick wrote: > I'm not sure you understood what I was saying. I didn't moan and > complain. I designed it to spec, even though I thought 4 cells was > stupid and arbitrary. I knew exactly who I was dealing with and why > they chose 4 cells, and it had nothing to do with it being a good > engineering choice. I would like to go on, but I can't say any more > about it.=20 >=20 > As regards buck-boost being stupid, I really think it is, assuming > you can choose the input voltage. Pick a voltage that lets you use a > more efficient and quieter topology. In a case like this, can't you use the cells in a 2x2 matrix? Still 4 cells, and probably doesn't require a buck-boost converter (depending on what you need out of the converter). Gerhard --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .