On 01/06/2011 21:45, V G wrote: > For example, I like the 6V 60mA cell on that page. Good size, reasonable > price. The question is, how much voltage and current can I get out of it > under ambient light conditions? For example, a room with the lights on an= d > possibly some daylight (not direct sunlight) shining on it. > > Any other ideas? I think with the average use of the tuner and put to sleep in between,=20 almost anything will do. I would do a rough calculation on average current consumption - you may=20 find it's not much more than battery self discharge, and the amount to=20 keep it "topped up" will be very small. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .