> How about a simple, dedicated IC like the Philips TEA1102? There is > a PCB in > the documentation, switchable for NiCd, NiMh, LiIon and SLA (from > .5C to > 5C)... and it's cheap... 1. Discontinued by Philips :-( 2. Does the job well, but unlikely to have been cheap enough. 3. Data sheet here http://www.semiconductors.philips.com/acrobat_download/datasheets/TEA1102_4.pdf Product page here. http://www.discrete.org/pip/TEA1102.html#support RM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist