OPUS BT-C2000 vs OPUS BT-C700
OPUS BT-C2000 is the analysing charger I use for cycling baterries. I use these currents:
- AA - C: 1000 mA, D: 500 mA
- AAA - C: 400 mA, D: 200 mA
For personal use I preffer the smaller OPUS BT-C700 with these currents:
- AA - C: 700 mA, D: 500 mA
- AAA - C: 300 mA, D: 200 mA
BT-C700 charges with lower current and at the end of the charche (at around 1.45V) it halves the current and terminates on what seems to be 0dV. Both these things should lead to less wear on the battery and higher cycle count. But is it so? Let’s put it to the test!
- EBL 2300 cycled on OPUS BT-C2000 vs EBL 2300 cycled on OPUS BT-C700
- EBL 800 cycled on OPUS BT-C2000 vs EBL 800 cycled on OPUS BT-C700
I was expecting higher cycle counts for cells charged with BT-C700 as oposed to OPUS BT-C2000. That did not really happen.
The internal resistance (a good health indicator) was very similar for all AA cells, that means both chargers performed equally well.
I am puzzled with the AAA results. The BT-C700 did a better job from internal resistence point of view, but yielded less predictable capacities. I don’t know why.
I prefer BT-C700 for AA cells and BT-C2000 for AAA cells.