(28-Mar-2023, 11:08 PM)sevro Wrote: That's one of those specs that's probably best served with a little more explanation but that could further get lost in translation I guess. Your assumption is correct, see the image I just tried a test with x4 of my 6s 1300mah in parallel on the 2nd channel with a single 6s 1300mah on the 1st channel. Note the wattage listed on the second channel, clearly the charger was not designed to max out at 100watt per channel.



Balance current is one of those specs that's overlooked but probably one of the most important. Those 4 button chargers like you had would spend half the time to hit just under 4.2v per cell and the rest of the time trying to balance them. So even for someone that doesn't really need a charger with 200watts capable on AC and are only charging small cell packs will take advantage of the overall quicker charge times. Which saves A LOT of time overall if you're only charging onc pack per channel. 

Enough of me shilling for Hota for now. 

hey sevro just another favor!

please check if you could parallel charge 6pcs of 6S 1300mah on one channel only. this will validate my concern if the D6 pro can distribute more load than 100W to a channel when needed as in this use case scenario.

your utmost patience is much appreciated sir!

In the picture I posted it was running those 4 batteries at 121 watts at the beginning of the cycle, so yes the charger can do over 100 watts on one channel. This was with the packs closer to 3.7v per cell so when they're closer to 4.2v it would max out at around 131watts (25.2v x 5.2).

When you're talking 25.2v x 7.8 = 196.56w but that will only be at a later state in the charge. When you first put them on there at 3.70v (22.2v for 6 cells) 22.2v x 7.8w = 173watts. So the wattage will peak out at some point closer to 196watts when each cell gets closer to 4.2v. But the charger is smart it's likely going to start ramping down the wattage overall when it's getting closer to full and that's assuming it's running at peak efficiency.

But just like with your charger or any charger regardless of what you ask of it, it's going to top out at it's max current. So in the case of your charger that can only handle 50w but you ask it to do 25.2v x 5.2a it's going to max our at around 2amps instead. My old 100watt charger would have been topping off closer to 4amps.

Hopefully this is making sense, this is "ohms law" by the way if you're not familiar. So you can see how these figures are locked in by physics. That's why max watts/amp rating is ambiguous without a voltage value.

(29-Mar-2023, 02:04 AM)sevro Wrote: In the picture I posted it was running those 4 batteries at 121 watts at the beginning of the cycle, so yes the charger can do over 100 watts on one channel. This was with the packs closer to 3.7v per cell so when they're closer to 4.2v it would max out at around 131watts (25.2v x 5.2).

When you're talking 25.2v x 7.8 = 196.56v but that will only be at a later state in the charge. When you first put them on there at 3.70v (22.2v for 6 cells) 22.2v x 7.8w = 173watts. So the wattage will peak out at some point closer to 196watts when each cell gets closer to 4.2v. But the charger is smart it's likely going to start ramping down the wattage overall when it's getting closer to full and that's assuming it's running at peak efficiency.  

But just like with your charger or any charger regardless of what you ask of it, it's going to top out at it's max current. So in the case of your charger that can only handle 50w but you ask it to do 25.2v x 5.2a it's going to max our at around 2amps instead. My old 100watt charger would have been topping off closer to 4amps.

Hopefully this is making sense, this is "ohms law" by the way if you're not familiar. So you can see how these figures are locked in by physics. That's why max watts/amp rating is ambiguous without a voltage value.

my previous trade did not exactly put ohm’s law in my plate so i am sadly unfamiliar with it. BUT the manner in which you explained how the charger manages its resources during the charging process is clear as day! i suppose its time to tick off the checkout counter for the HOTA D6 pro! cheers!

as a follow up to this thread, i would like to explore giving my imax B6 a new lease on life by considering its potential to use its DC input source. what can i expect feeding this with 18V?

2-6S charging. Honestly, DC is useful for certain applications. If you want to charge a pack or two while out in your car, that's when you use DC input. Or say you built a shed with a solar panel on the roof and want to charge away from mains power, same reason.

So to use DC you need a DC power supply (pointless since yours does AC) or batteries. I would probably use yours in the car. So you would need to find a reasonably high amp feed from one of the fuse boards in your car. If you don't use the cigarette lighter, that would be the obvious one, since that circuit can generally deliver 10-15A. I would mount an XT60 connector near to it and connect it to that circuit. Then make a lead to connect it to the DC port on the B6. So you can plug it in next to you while you drive to anywhere you are flying.

Or if you have a hatchback type car or van or truck, put a second 12V battery in the back, connect it to the starter battery using either a dc dc charger or voltage sensitive relay (newer cars with regen braking need dc-dc, older cars with old school alternators can use a vsr). Then wire a distribution hub or fuse board into the battery and then the B6 from the fuse board. To work out the fuse size, multiply the voltage by the max amps and add a bit more. So output wattage is 60W and input voltage is 12V, so 12 into 60 goes 5 times, so 5A, but add a bit more for spikes, so either use a 7.5A or 10A blade fuse to protect that circuit. I use a 10A on mine. Also remember to use adequate cable to connect it to the circuit and overspec it a bit, so I would probably use 12 or 13 AWG cable with a max length of half a metre (1.5 ft).