Found it https://www.fogstar.co.uk/products/...UA&utm_source=facebook&variant=40906783588411Do you have a link to this? I can't find it to save my life!
Found it https://www.fogstar.co.uk/products/...UA&utm_source=facebook&variant=40906783588411Do you have a link to this? I can't find it to save my life!
Do you have a link to this? I can't find it to save my life!
LiFePO4 Prismatic Cells | Fogstar Batteries
We offer a wide range of LiFePO4 Prismatic Cells purchased directly from the manufacturers. Legitimate cells that come with a QC certifications to state that the voltages, capacity and sizes are all matched.www.fogstar.co.uk
Scroll down after the Lifepo4 cells, both battery cases (105ah and 280ah) are there. It is a pretty good deal especially if you get a 15% off offer, plus I see post is free, maybe I made a mistake not buying these! lol
Do you have a link to this? I can't find it to save my life!
In the same position - just waiting for them to arriveThanks both - unfortunately 4S, I have 16*280Ah cells on backorder with them at the moment. Might change my mind but at the moment I am planning on making a
ive just had a text from Becs at Fogstar - the cells have arrived so fill your boots !!In the same position - just waiting for them to arrive
I only ordered the other day so expecting Decemberive just had a text from Becs at Fogstar - the cells have arrived so fill your boots !!
Just get in touch with her? You might get lucky?I only ordered the other day so expecting December
That’s a fair point, the pack was at 13c, but it’s looking more likely, cell 2 was sub par and brought the whole down.Don’t forget to adjust if you are not testing at the same temperature as in the spec sheet, temperature will affect capacity.
Further to your message, reading up on it your most likely right that temperature is at play here. Thanks for pointing that out, I'll try again at the correct tempDon’t forget to adjust if you are not testing at the same temperature as in the spec sheet, temperature will affect capacity.
I think grade A would be similar in capacity at the temperature I tested at.Another way to look at is what was the price difference Grade A vs Grade B? Bigger than the (possible) capacity shortfall I would suspect.
Yes, all top balanced in parallel with a bench psu to 3.65v, then reassembled in series, left for an hour or so before testing.Did you measure the individual call voltages before connecting them? Did you top charge using a psu? Just asking out of curiosity
Being prone to attacks of RLS, which destroys any chance of sleep, I found myself dressed with nothing to do at 2am this morning.
It was even colder at 10c, but I pressed on with the test of my second battery anyway.
Just finished now, almost identical result 270.80ah, 3407.6wh.
Battery one was 270.40ah, 3409.5wh
I think I can safely say both batteries should make to spec at the correct temperature.
I’ll recharge, top balance again and get them into service asap.
It’s easy to get worried with the ‘relatively’ high costs involved, thank goodness there’s resources like this forum to have a whinge…er! I mean chat! ? and get good advice.
Yes, I agree.Hrm.... 4x 896WH = 3584 WH
so 3408 / 3584 = 95.13% rated capacity
I would say you did pretty decent. Probably had 1-2% loss form the BMS itself which would mean you are in reality about 96-97% of what its supposed to be.