These cells claim to have a 25A continuous rating but have a “temperature limited” rating of 35A. But any 25A cell can be used at 35A if voltage sag and overall cell life aren’t the priority.
These are most likely cells from one of the smaller China factories that Efest uses. The cell-to-cell consistency isn’t as good as those from the big manufacturers (as you can see at the start of the discharges) but this isn’t a big deal for most people. Cycle life can be worse though.
If they can be found for a much lower price than the VTC5A and P26A they could be worth it if cost is the priority.
Yes these cells are less than half the price of the VTC5A from the same wholesaler, although only 20% cheaper than the VTC5. Would you go for the Apexium or the Sony VTC4 at the same price?
I assume it would come down to priorities as you stated. Current rating vs capacity vs matching cell discharge etc.
I don’t know anything about the performance of that Apexium so I’m not able to compare it to other cells. Check around for pricing on VTC5A’s and Molicel P26A’s. You might find someone having a sale.
The way I cheat to make life easier is to still glue together straight lines of cells, even if im glueing together cells of different p-groups. (Notice in the picture below how some cells are the opposite direction from the ones they are glued to).
I would like to highlight this step. It’s a bit of a pain, I use the handle of a small screwdriver to mold the fish paper into the valley. I you don’t form fit it the pack will bulge.
It’s a bit tricky. Because you have to cut it to the right length, then compress the whole pack and tape it so it keeps its shape…but as they say “we haaaave the technology!”
Who else is in love with the fact that you can disable charging of a board with an LTT smart BMS with the touch of a button on your phone even if the board isn’t in the room
My Bluetooth is not that strong lmao. But thinking about that. Any idea if you can automatically stop it charging at a certain voltage? Like 3.8 per cell or sum.
Thats a good point, I was thinking along the lines of a separate setting I could enable and disable if I just wanted to bring the cells back up to storage if I knew I wouldn’t be using that board for a while. But it would be just as easy to change the voltage cap down and write new settings.
