Does anyone have any information on these batteries? They list the batteries at 8AH but they put out 200A? Can someone explain what they mean by this? Also, would they be good for a solar system. If so, would 4 batteries in parallel be 12.8v @ 200Amps / 2.4kw or 12.8v @ 8Amps / 96w? Thanks
Headway 38120 HP 3.2v 8AH LiFePo4 Batteries
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John Frum
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They are cylindrical cells the HP is presumably high performance.
4 cells in series would give you an 8 amp hour battery with a nominal voltage of 12.8 volts.
13 of those in parrallel gives you a 104 amp hour battery.
That is 52 cells for 1331.2 watt hours.
38120 is the form factor.
4 cells in series would give you an 8 amp hour battery with a nominal voltage of 12.8 volts.
13 of those in parrallel gives you a 104 amp hour battery.
That is 52 cells for 1331.2 watt hours.
38120 is the form factor.
John Frum
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The are referring to the discharge rate.
Thats the HP part.
They can discharge at 25c or so they claim.
You could use them for a 48 volt setup but I would only use them if you have a specific application that requires super high discharge rates.
Its just easier to make batteries out of high capacity prismatic cells.
Search the forums for Xuba to find the current value proposition.
What is your application?
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Ampster
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I would not use HP batteries for storage. I used those kind of Headways for an e bike project and they were great for short bursts of acceleration but a waste of money for long term storage. At $10 each and 25 Watts that is $.40 per Watt. Sorry for the late replay but I just joined the forum and am catching up on my reading.
limey44460
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whe
where can you get them for$10.00
Ampster
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The company I was buying them from has been out of business for years. 8 years ago I bought some from a Hong Kong supplier but I am sure they are gone too.
Ampster
Renewable Energy Hobbyist
Years ago I got one cell in an ebike pack so hot it vented. Smelled like ether. After it cooled down it charged fine.
What they mean is the cells have very low internal impedance and can discharge at a very high C rate.
The capacity is 8 AH. Which means discharge at 8A for one hour. Or 1A for 8 hours. Or 200A for 8 seconds (probably). Mathematically these cells should output 200A for a little over 2 minutes, but I wouldn't want to be anywhere near them if you actually tried to do this. And I bet they won't do that too many times.
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