Self discharge: >60% charge remaining after 28 days This is from the datasheet with the correct type number and a photo of the battery and pack saying “Low self discharge”
Maximum temperature raise at different discharge currents: 1A:+0,9°C, 2A:+0,0°C, 3A:+2,1°C, 5A:+2,8°C, 7A:+5,2°C, 10A:+8,9°C, 15A:+14,1°C
This is high capacity D cells, the capacity is around 4 AA cells.
There is some capacity difference, most at the start of the test after a couple of cycles it is reduced. Only one of the cell lives completely up to the rating.
Conclusion
This D cell has some real capacity, but I wonder about the low self discharge.
Could you charge the cells up and then come back to this thread in about 3 months and 6 months one battery at each time period. Then we will know if it’s low self discharge. If its mostly dead at the 3 months mark. No need to continue on with the 6 months one
I bought 30 of these Ansmann 1.2 volt D cell NiMH 10,000 mAh AKKU batteries and put 6 in the Ansmann Energy 16 plus charger. They seemed to be flat and I tested them on a multimeter and it read 0.2 volts. I charged them and the red flashing mode once per minute came on for 3 hours and after a while the charger was flashing green once per minute, I have done this 3 days in a row and before when they were on green they were cold, now on the 3rd day after 3 hours red they are on green lights and pre-charging warm.
Is this how they should be? were they on a forming charge before? I have heard that some batteries need preparing before they are fully charged.
I have figured out what I was doing wrong, I forgot to set the Multimeter at Null DCV, on there I set +or-5 and set ohm yellow knob to adjust pin guage to zero then attach the electrodes to the battery. The batteries are reading full Voltage and full Ah on DCmA 10A with the 10A socket.