let me be the dickhead to say this
list of dumb moves:
IP rating
potted
voltage not adjustable (no, 3 toggles doesn’t count)
current not adjustable
big af size
probably less than 5% people actually care about charger fan sound, just use some good quality fan with push pull config, 6000% easier for maintenance as well if u don’t pot the damn thing
I think what’s being asked is what happens at the practical end of the CV stage? Is there a complete charge cutoff after the current drops to a certain level, say, 0.1A, or is the final voltage applied indefinitely as long as the pack is on the charger?
The silent operation is only possible with more efficient power delivery. There’s no way you can cool a conventional charger at 600w in the same size. It just won’t happen.
Half the reason I’m announcing the product during production not after it is due to learning which final tweaks the community would want.
The heavier spec is due to potting. If enough proportion of the customers doesn’t want that, then we won’t pot them. Currently, batch one is at the stage where the PCBA is freshly baked out of the SMT factory.
As for larger, I disagree. Please check again. Even if we’re talking about the radium performance charger here, which I have no intention of being a competitor against, their charger is 173mm90mm63mm, which works out to around 9.8 Litres in volume. Our charger is 200mm84mm44mm, which works out to around 7.4 Litres in volume, whilst also being 2 whole centimetres thinner. I don’t think that counts as smaller…
Tbh I’d rather have fan for variety reasons. One being my dumbass forgot i left my board charging and im reminded by the noise as i walk by. IP rating i could maybe understand if you chuck the charger in your backpack and get rained on while riding or something similar but fairly moot i think for majority of folks.
Fair
Decently fair, depends by person. As someone who lived in a city that’s covered in either rain or snow for more than three quarters of a year, I would love water/moisture resistance
The 3 toggle design is better than almost every charger out there other than the dedicated “balance chargers” which you need for lipo batteries, and even those needs an additional DC power input. I think having a singular charger covering three voltage level works out well for a good number of people owning different boards from different brands, I myself am certainly one of those people.
Unfortunately this alongside the voltage fine adjustment as well as the screen were all cut from this edition, and some of those (voltage fine adjustment) might be forever gave up, instead it might be replaced with the existing profile toggles for different series packs, and another toggle for leaving your battery 80% charged for those who live on hills and can’t accept a full charge, or just want to prolong their pack’s cycle life.
These were the two features I most regret not adding, btw. But essentially what you’re asking for now is a portable DC stable voltage power supply, the smallest 600W model that I own which only operates at 220v is about 12 Litres in size. The profile needed to complete a CC/CV charging for lithium battery packs is too complicated to fit fine adjustable voltage levels. It just can’t be done easily.
As for the current, I definitely think there’s room to add that to the list of features in the future, but it would increase both the size and the cost of this charger.
Again, please recheck this statement for me and find a charger that is 600W, works on a wide voltage band from 100v to 240v, and is passively cooled. Hell I’ll challenge you to find one that is fan cooled too.
You really want to hear someone with a jet turbine firing off in a lecture? or your office? or while you’re enjoying a meal? I strongly argue against the 5% guess. I have explored the fan options, but none of them were up to standards to cool the charger quietly, not to mention the increase in size and bulk.
Yeah I’d be impressed if more than 1% of the people who bought the MFG actually knows how to desolder, replace components to their exact specifications and serials, resolder, and fix IC on PCBAs. This isn’t just some production board battery pack, this is a properly manufactured and assembled custom PCBA that’s built to be as compact as possible.
Potting is dumb for the extra weight, and that’s it. The benefits from potting is a bit more extra cooling, water resistance, impact resistance, vibration resistance, and crush resistance. Obviously if people don’t care for the benefits and only care for the weight, I did mention there’s a chance to save that design flaw didn’t I
I’m confused by this statement.
Any simple CC/CV power supply will, simply due to its design, automatically switch over to CV “mode” as the pack voltage rises to near the power supply (charger) voltage. There is no need for any additional “smart” functionality or profile loading needed for this.
How does your charger do this CC/CV changeover differently?
Pardon my pedantism but I’m also debating your use of the term “trickle charging” as that’s not what is being done here. Li-Ion chargers just complete the standard CV portion of the charge, they’re not doing what I would call “trickle charging”.
For me, that’s what happens with Pb-Acid batteries being held at a lower voltage by a continuous trickle of current to compensate for their past self-discharge. There’s no charging up or rising voltage.
The current at the end of the CV portion of a Li-Ion charge does keep dropping to a lower and lower level, but that’s not “trickle charging” IMO.
After trickle charging, the current supply is cut off.
Sorry, to my understanding the CV stage of Li-ion chargers is called trickle charging. I never looked up the proper definition of it I just assumed what it meant by context.
Based on a certain taper current level? Or is it timer based?
If based on a certain current level is there a backup safety timer that shuts off current if a pack has not finished charging by a certain time (might be damaged)?
If there is no timer I’d like to request that as a verrrrrrry important safety feature.
Okay, thanks.
Your CV stage current is several amps for quite a while though. A touch higher than typically considered a “trickle”. 
I guess as long as folks know what’s going on it doesn’t matter. I’m just a stickler for reducing confusion wherever possible.
It isn’t. It works the same. CV stage is on as soon as the detected voltage (with the charging current still supplied) reaches 50.4v/54.6v/58.8v
I believe it was 0.1A, I’ll need to recheck on this.
I also need to confirm this with my team.
I see, if one of the cells gets desoldered and that cell isn’t charged to full, the charger might assume it needs to keep charging and doesn’t cut off? But I thought the BMS could end this process? Or are there other reasons for a timer to exist? Could you please explain why so if we don’t have that feature I’ll make sure they add it?
Ha you reduced my confusion with me not knowing I was wrong. Thanks
People, please insert your opinion here as it will help finalise this product, potentially in a direction that favours your interests.
0 voters
FWIW my 7A 12s YZpower chargers are so quiet I have to put my ear right to them to make sure the fan is actually spinning 
to add to this
just add good fans 
#noctua
My 10a chargers from OHRIJA are decently quiet. Nowhere near the jet engine of the 1000w exway charger.
Ref dims, 90x63x170 for both the 14s10a and the 12s10a. The 14s one has a screen on it, and both cost under 100 bucks
Obviously “just buy it on aliexpress” is always going to be cheaper, so I’m not saying this charger doesn’t have a place. But still
Typically it happens with older packs. Their self-discharge rate is higher than the taper current cutoff threshold so the charging never stops. I’ve also seen it happen (never stops charging) with older cells that don’t have high self-discharge and certain chargers but I don’t know why that happens. Lastly, a pack with a high quiescent current draw (accessories, ESC, whatever) could force a charger to stay on. Probably not at that 100mA taper current cutoff you mentioned though.
I would certainly never want a charge to continue indefinitely due to unknown circumstances anyway. Just as a standard “best practice” I would want the charger to automatically stop after a certain amount of time.
Also never assume that every pack used with this charger will have a BMS! We can never base safety on what we hope our customers will and won’t do.
This very statement threatens the feature to switch in between 12s/13s/14s. If they aren’t even willing to ignore the countless warnings regarding the MUST being you have to use a charge BMS at the VERY LEAST, I’m gonna assume said person won’t remember to switch between the three modes as well, which just renders disaster.
hello!
#nobmsganglmao