The Final Word On Grade B - Lifepo4 cells Grade A vs Grade B - SFK

Episode 1 - The issue: 0:00
Episode 2 - Top Balance: 4:12
Episode 3 - Cables & V-Sense: 6:16
Episode 4 - Cell 1 Test: 7:40
Episode 5 - Cell 2 Test: 13:50
Episode 6 - Cell 3 Test: 18:04
Episode 7 - Cell 4 Test: 19:35
Episode 8 - SFK EV Grade Cell 280N: 23:17
Episode 9 - Conclusion: 26:11

In this LONG video, we show what we deal on a regular basis and why we refuse to ever carry grade B cells regardless of what everyone thinks of them.

While it is true, that you may get some grade B cells that are "OK" its just as likely someone else will not. It doesn't matter who the vendor is, or which batch; all grade B share 1 thing in common:

THEY ARE ALL OVER THE PLACE: Some are just short of being grade A, some are potentially problematic cells that may seem ok for low amp use, and some are just terrible and will ruin your pack as is in the case situation. A customer bought one of our V3 kits but already had cells from an Alibaba seller; they kept having there BMS shut down during charging and or discharging. Despite initially RMA-ing the BMS twice, our customer still had issues and finally they sent the cells and kit to us so we diagnosed it and found one of there cells was causing all of the problems.

We took this opportunity to show you what can happen. This does not mean it will happen to everyone, in fact if you by grade B on average you will get a cell that is generally between what a EV grade A is and something that is just garbage.

Most people will never know the difference until the day they actually try to put a load on it. They will also found these issues lead to rapid degradation and other premature aging. They cheap comes out expensive, so choose wisely.

We already explain the difference on Grade A vs Grade B in this video:
   • EVE Lithium Iron Phosphate LF304, 280, 280...  

Grade A Cells available form us: https://www.sunfunkits.com/category/2... True EV grade with complete manufacturers test report and all data columns, (Unlike the sheet that is conveniently missing the case ID and IR 2/3, Volt2/3 from other sellers claiming to have EV grade Cells).