Assuming that the numbers are mA, then 120 for a very safe long charge, 180 for a fairly safe long (but not quite as long) charge. Full whack if you intend and manage to keep a close eye on it toward the end of the charge time. Battery is a 1600mAH, 1/10 of that is 160mA, so 10 hours at that plus a bit for luck, i.e. overnight.