BlueSwordM, is there news on this project?
Yeah, something like a modified RC3000 is out of the picture.
@WalkIntoTheLight, as I’ve said before, if the additional features don’t work out, then the basic adaptable voltage charging(3,60-4,20) and very low current voltage recovery will be the only features implemented.
Why is that?
Cost…
Perhaps he tallied all the options, say 32 of them, and gave ‘a not probable’ value of 1; to a ’probable’ value of 100; thus creating 3200 total points of which he subjectively added up some 87. This gives a ratio of 87/3200 = 0.027188 or 2.718 % chance of fruition.
Not defending WalkIntoTheLight, just pointing out what he could have done…
Guys, it was a joke. The number I picked is just e (Euler’s number), expressed as a percent. I thought pi would be too obvious.
I don’t think anyone has mentioned the Adeaska VC4 Plus.
( Review )
I haven’t seen much if any mention of this charger here. It looks like it already has multiple charge cutoff points, can do 4 26650 at a time, can charge relatively fast, and the base model doesn’t cost a small fortune. The only thing I can’t tell is how long a cell it can support. As a Sofirn Protected 21700 owner, I’m interested in that answer.
Unfortunately, it doesn’t have very low current voltage recovery, or adjustable charge voltage.
I had previously purchased the SQ2 from Adeaska. A 2 bay 1/2 & 1 amp multi-charger. After a while, and after purchasing an inline USB tester, I realised the unit was defective. There never was a constant current delivered and the mode selection was inverted with two cells; i.e. with two batteries selecting 1 amp delivered some 400 mA (peak). Had to select 0.5 Amp to get some 800 mA. From ZeroAir review, this model is better.
As the logistics were erroneous and the current would constantly vary, I opted for a MiBoxer C4-12. The Miboxer has an equally nice display and IR test (the SQ2 doesn’t have IR). The VC4 has independant buttons / status display for all bays and IR. Zeroair mentions the sliders are ’scratchy”; which I had greased.
@Blue: It does have Battery Activation - see the blued manual in review.
@Sidney, but we don’t know about the currents used, and they aren’t settable.
I’m not only making this charger for BLF, but also for SecondLifeStorage/DIYPowerWalls.
I’m soon going to do a feature freeze.
No love for Xtar chargers?
My input/wishes.
- The contacts should not be flat. Some flattops are slightly recessed in the wrapper.
- Ideal would be slider switch or a knob to set the amps. One for each cell. Not a central button that controls all cells. An advanced menu is fine but everyday charging should be KISS.
- “12V-20V input voltage compatibility” I assume it also supports 240v on top of that?
I really like the 12v option because I like to quick charge cells in my car.
What about 5v for USB charging?
I think trucks quite often have 24v? Even up to 48v? (boats)
I had a electic razor that accepted anything from 5vDC to 240AC. All integrated in its small stand.
I don’t think Xtar would be a good fit for his requirements. Xtar generally does fully-automatic chargers, with no ability to tweak any settings.
Take a gander at the VC2S specs.
It’s a nice charger, but it’s fully automatic. AFAIK, you can’t adjust the charging current. It just does 1A/2A charging based on what it decides to do based on internal resistance. In my experience, that means it always picks the max current for 18650 cells.
Give it aggressive look with black and orange colors 
At least 4 amp charge rate x 4. 5 amp would meet some charge rate capabilities which will just go up.
Discharge/storage charge.
Cycling.
Conditioning/recovery.
Data log for charge cycles/batteries.
Battery ID for saved custom settings.
1. No.
2. Yes.
3. Yes.
4. Yes.
5. Yes.
6. Yes.