We've been here not so long ago, in some depth >From the thread [EE] Question about constant current and Ohm's law of late November 2010 In at least two documents Panasonic regard trickle charging as the least-preferred method http://www.panasonic.com/industrial/includes/pdf/Panasonic_NiMH_ChargeMetho= ds.pdf and Duracell are OK with it at C/300 http://www1.duracell.com/oem/Pdf/others/nimh_6.pdf whilst at the same time saying elsewhere, as Russell does, 'Don't do it' Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .