Interested, depends by price. Constant current charge
A plug for charge small Lipo battery at low currents even up 30mA would be nice
Orange backlight display ,doesn’t annoying on late night as many Chinese white-bluish display chargers.
Red ,Green Led each slot for a fast detect battery status.
And more for future batteries!
Seriously. When this size becomes more popular manufacturers will start adding protection to it and the result will be 26850.
Honestly, we don’t need a web browser on a charger. The last thing I want is my battery charger to have access to the internet or be accessible from the internet. Too many people don’t know how to properly secure their home networks. It would become just one more device that can be hacked and used in a botnet. On top of that, someone would need to constantly provide updated firmware and each of us would have to remember to check if there’s a new update.
Remember, the “S” in IoT stands for security.
Yeah, there will be no IOT features.
Also, an orange backlight display? That would certainly be new.
Anyway, I’ve planned to finish the UI mockups and talk to manufacturers once again once my mid terms exams finish.
This project will have to be realistically continued at some point, and it’s this year!
I haven’t been really active or a great BLF member for a while as I’ve been rather involved in other communities and have had stuff of my own seriously slowing down my pet project.
slow down current when near finish charging and no trickle to avoid overload
I mean, that’s how we do normal CCCV charging, yes?
For example the Opus 3100 decrease the current when battery is near full,that’s good.
But don’t like their charging method, pwm at ~3A peaks. Think isn’t safe for small batteries.
About the termination Algorythm, I prefer have batteries at 90% than overcharged and without fast charge.
It’s possible add 1 slot for 9V block Ni-Mh (these are built with a series of 7 cells for a total of 8,4V) and even 9V Lipo?
Wait, they’re using PWM to actually regulate current?
That’s certainly an interesting method, but mostly for discharging, not charging.
Yes.
I didn’t want it again expecially with high peaks on small batteries.Imho CC-CV is more safe.
Or you can consider MCC method where the current decrease gradually during the charging but is more complex.
https://www.google.com/amp/s/mobile.engineering.com/amp/19955.html
I wouldn’t worry about it at all. Of interest maybe is some recent research (I posted a thread about it here a couple weeks ago) that high pulses might actually be good for li-ion cells in terms of mitigating dendrites and higher IR that builds with time/cycles. The research wasn’t on manufactured round cells like we use, but it should apply to all li-ion chemistries and form factors (although I’m unsure about round cell vs. pouches there). Interesting findings and maybe one day we’ll see chargers that emulate this type of sequence. Certainly geared more toward the auto/EV industry but if they adopt it then it will surely trickle down to consumer devices eventually.
Ok thx for this info,but I was talking about AAA NI-MH cells.
They aren’t robust like bigger 18650 cells for pwm charging.
And would not like it even for small lithiums like 10440
True, but 3A isn’t going to hurt them - these are just micro-pulses (as opposed to constant current for charge or drain). Depends a little on the particular cell of course. For my AAA I generally baby them on the charge but have been impressed at the current they can handle when draining…seem to last just fine and I’m not seeing any reduction in capacity or cycle life (mostly Eneloop Pro and old Imedion & Powerex, with some Fujitsus thrown in the mix…I don’t think the older Duracell models or any Energizer I ever owned would respond as well).
Remember, these charger companies and the cell manufacturers are pretty smart folks and aren’t going to intentionally design something that puts cells (and therefore end users) at risk, either physically or with complaints. Opus has been around a long time and has had a pretty good record.
I disagree, considering the fact that we are surrounded even by branded junk chargers that cook the batteries at high currents and without precise termination.
Maybe that’s made for increase the sale of new batteries,
Buy a junk charger and then yes, maybe, you might get that performance. Opus isn’t one of those.
I mean major Brands,like many new Panasonic,Duracell chargers aren’t good.
Fast charge with dumb termination and often only 1 generator for 4 slot.
The Opus3100 isn’t right for AAA severals recharge.
I am in. Please add me for one.
Fiine.
I’ll try and include as an accessory, a custom magnet cable for 26800s.
Better that than having people trying to use unsafe chargers
I‘m still in!
I am interested.