2) hidden switch for advanced voltages sounds good.
3)
Understandable. About solder pads : ultimately wires can just be soldered where the contacts are soldered in the charger, dedicated solder pads don’t really add anything.
4) 92mm fan sounds great.
Something else, about the UI :
5) Could there be a way to configure several slot at once like on some chargers, for example the zanflare C4 : before 9s have passed since 1st cell inserted, the first button press enable configuration for all cells inserted. (not saying it should be this way, and in this case 9s is actually a bit to short to insert 4 cells)
The solder connection to the battery contactor is dual purpose, it is both an electrical and mechanical connection. If someone were to try soldering a wire to the board at that point, the contact would fall over when the solder became liquid. Maybe that’s no big deal for someone with solder skills and a quality iron, but that’s not everyone.
Dedicated solder pads to anode and cathode battery rail connectors add some value and they are really very easy to set or put, all it takes is a couple spots where the solder mask is removed or unlaid, and maybe positive and negative (+, −) signs. The impact on the charger's cost is absolutely negligible, virtually nothing.
I see the default charging currents' list was modified, plus an additional 2.5 A value was added. Since my list was written with decimals using point/period as separator (learned back in the days of writing computer programs), but the 2.5 A value was added with comma, it looks weird/wrong. I will refrain from judging the new value addition and how it fits in between, but in any case here is the list (whole point 1) fixed with commas (as BlueSwordM did at first):
.5 was best for gentle charging quality 18650
1.0 was for 18650 that you don’t care about as much.
The specs on my protected EVVA 3500 rechargeable 18650 says standard charge rate is 1000mA which is 1.0 amps.
I am not sure if that means the recommended charge rate, or maximum rate. Or what rate is better for a new cell. Couldn’t find anywhere if they are ready to use right out of the charger either.
Any charge rate that doesn’t heat the cell is a gentle charge for li-ion. I haven’t noticed any heating of my Samsung 30Q charging at 1 amp. Do you notice any heating of your EVVA at 1 amp? That’s like 0.28C, so that sounds gentle to me. Do you have a link to what you read?
Hi, below are additions since last update and the BLF INTEREST LIST file linked to in post #1 have been updated too.
The interest list count now stands at 547 chargers.
Hello rost333 , you’re doing a great job, Thank you.
I suggest you check out two posts, I think they asked for two and on the interest list they’re only listed for one. Post #1227: sac02 , Please add me to the list for two units, please. Post #1242: awoody001 , Interested in 2 please .