Most manufacturers recommend AGAINST trickle charging as it can have some bad side effects, especially on NiMh's. If in doubt, check with your batteries manufacturer. Much healthier to do the slow charge (14 to 16 hours at 0.1C) followed by a daily boost of about 1 hour at the slow charge rate (0.1C). Trickle charge is ,by most diffinitions, .02 to .05C.