I agree with Russel, but I have always used 1.35V max per cell, so 1.4V sho= uld not do too much damage. What is really important is to stop the charge when max V is reached. My $0.02, Jean-Paul N1JPL > On Apr 19, 2016, at 7:29 PM, RussellMc wrote: >=20 > Rushing (as often). > In the absence of "proper' charging management, do not charge above > 1.4V/cell. > *** DO NOT *** trickle charge once this voltage is reached such that > voltage is allowed to rise. >=20 > Older NimH under about 1600 mAh had recombination arrangements to convert > electrolysis products back to water. > Newer ones (above ~=3D that capacity) do not have this and WILL vent and = dry > out. > The old "1% trickle or 10% trickle is OK" no longer applies. >=20 > Keep batteries as cool as possible. > 40 C is on the high side if lower is possible. >=20 > Cutoff voltage needs to be accurate or low. > Vmax varies with charge rate. > Erring on the low side reduces capacity but increases lifetime. > Set too high and the cells will charge forever. >=20 >=20 > Russell > --=20 > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .