Eventually , by marking and partial swap outs , determined which one of
4 was not up to it especially when environmentally cold, despite 1.5V DVM-battery-test showing ok with that sort of minimal test load. Any chance of deep-cycling, asymetric "ac" charging or whatever, to bring up the performance of A in this list.? B would seem to be ok (for the moment) despite low low-load voltage. For about 1 second duration, with 12 ohm load, then 1.2 ohm load over each battery and the measured voltage, for AA size 2.5Ah NiMH cells A, 1.32V, 1.13V,duff B 1.23V, 1.16V,ok C 1.33V, 1.25V, ok D 1.32V , 1.23V, ok Just how they were, not charged or discharged individually for this test, so B perhaps is more dicharged than the others. So I assume the POST routine is something like 1 amp draw for perhaps only 1mS but fail test if measured voltage is less than 1.15V. Camera a Pentax optio60 pocket camera, requiring 2x AA batteries- posted
9 years ago