> No, because the charger will create multiple distinct voltages for the > various connections. For example, in a four-cell series lithium polymer > battery pack, at top charge each cell will be somewhere around (very > roughly, from memory) 4.125V. To charge all four cells through the > balancing connector, the charger will create supplies of 4.125, 8.25, > 12.375, and 16.5V, which it will apply to the four nodes (with > appropriate modification for proper charge cycle management). Each cell > will then see 4.125V across it, with each cell floating 4.125V higher > than the cell below. I'm just looking at making a series string charger whose job is to charge all cells fully. These are NimH and utterly precise end point is not needed. I'm looking at putting a shunt across each cell that accepts current when cell voltage gets to a certain level. If a constant current source is used to drive the string the shunt could be a simple voltage sink or could toggle to a short circuit across the cell when endpoint is reached, provided each cell is fed by a diode from the charging string. With a shorting version you monitor the string voltage at constant current and when it reaches ~=3D 0 you know that all cells are charged. Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .