Short_Shot
Solar Addict
- Joined
- Jul 13, 2021
- Messages
- 1,823
Someone posted a sale on 105AH cells a few months back, and given the price of roughly $150 for 4 cells I figured I don't have much to lose here.
Am running individual cell discharge tests at 21A and already am seeing the expected falsely advertised specs. The first cell is ~84AH. The voltage rebounded to 2.94v after the test ended, so there's clearly not any extra significant capacity here to be found. It also, for some reason, seems to be showing a rather unstable voltage curve.
I am testing the second one now (green curve above).
I will test all 4 cells, then top balance again and put into a 4S pack and see what we get.
For my ICECO fridge this will still be sufficient capacity for a couple days of operation - I plan to use this pack in the bed of my truck with said fridge to avoid running power back there - but Liitokala strikes again.
Oh and FYI, I believe the "low" voltage of 3v or so to be from the 2 foot long 10awg wires I am using here so I am not stressed about that part. That is an "expected" drop of 0.2v, however that should still be well within the knee on the tail end and shouldn't affect results by more than a couple of AH.
Please correct me if I am wrong on that theory though.
Am running individual cell discharge tests at 21A and already am seeing the expected falsely advertised specs. The first cell is ~84AH. The voltage rebounded to 2.94v after the test ended, so there's clearly not any extra significant capacity here to be found. It also, for some reason, seems to be showing a rather unstable voltage curve.
I am testing the second one now (green curve above).
I will test all 4 cells, then top balance again and put into a 4S pack and see what we get.
For my ICECO fridge this will still be sufficient capacity for a couple days of operation - I plan to use this pack in the bed of my truck with said fridge to avoid running power back there - but Liitokala strikes again.
Oh and FYI, I believe the "low" voltage of 3v or so to be from the 2 foot long 10awg wires I am using here so I am not stressed about that part. That is an "expected" drop of 0.2v, however that should still be well within the knee on the tail end and shouldn't affect results by more than a couple of AH.
Please correct me if I am wrong on that theory though.