I dug up my notes for some of the stuff I'd been researching last summer for charging batteries and came across notes for the texas instruments UC3906/2906, i think it would be better than the linear regulator/resistor combo for charging so I'm posting the data sheet in case anyone wants to look at it with me... actually the data sheet won't upload but I did post another document I found on the 2906/3906
The data sheet is pretty straight-forward... although I'm having some difficulty determining the resistor values necessary to indicate to the charger ic the bulk charge rate and for how many cells it's charging... maybe someone can make sense of it...
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