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Feb 04, 2017, 07:23 PM
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Mini-Review

iSDT Q6 Plus Mini Pocket Charger Quick Review


First off, I'd like to thank Tobey from Banggood who offered me this product for review and I am in general happy with the nice little thing. In this thread, I will share my personal experience on the charger. Hope it would be helpful.

Specs of the charger:
Input Voltage: DC 7-32V
Output Voltage: 0-30V
Charge Current: 0.1-14.0A
Discharge Current: 0.1-3.0A
Max Charge Capacity: 300W
Max Discharge Capacity: 8W
Balancing Current: 1A/cell
Balance Cells: 2-6S
Supported Batt. Type:
LiFe/Lilon/LiPo/LiHv (1-6S)
NiMH/Cd(1-16S)
Pb(1-12S)
Display: 2.4〃320240 IPS LCD
Operating Temperature: 0-40C
Storage Temperature: -20-60C
Dimensions: 80x80x33.5 mm
Weight: 119g
See more description: Click here

Unboxing
The order was firstly placed by Tobey on Banggood on Dec. 6, 2016 and got shipped on Jan 15, 2017 via China Post. It arrived here in Chicago in about a week. Really fast!
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The charger was very well packed by a thick foam wrap.
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Size comparison, with an iPhone 6S
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This is what it looks like after I opened the box.
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The inner side of the box has a piece of soft foam pad to protect the charger
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The front side of the manual is in Chinese while it's English on the back.
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The screen protector is only for protection purposes during transportation. It can't be left on when you use it.
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I didn't own any iSDT chargers before I got this one. I was told there is nothing coming with the 608 and 620 chargers so I am really surprised that Q6 has two XT60 connectors included.
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These are genuine AMASS products, very well built.
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It also comes with two covers so no more shrink tubes needed.
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There is a divider in the middle, which protects the wires from getting shorted.
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I really like the small size and the roller button. Can't believe this tiny thing can deliver up to 300W power!
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The front side of the charger is lower than the back side, making it a lot easier for users to read the screen. There are two ports on the right hand side: an XT60 output port and a balance port. The design of the balance port is really interesting as it can adapt to different cell connectors, all the way from 2S to 6S. This is the first time that I saw such kind of socket.
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There is a vent with a cooling fan on the back, providing better heat dissipation.
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On the left hand side, there is an XT60 plug for power input and a data port. I don't have a cable so I can't upgrade the firmware on the charger.
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The bottom has four non-slip rubber pads which I think work really well.
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After I peeled the screen protector, I was surprised to see several fingerprints!! How could?!
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Of course I didn't feel Okay with this. I then used a piece of very very soft micro fiber cloth to clean the screen. You know what? It actually left some light scratches on the panel!
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Can't figure out why iSDT's logic here. If your screen panel material is really soft, and there is no screen protector for this charger on the market, why don't you simply provide a clear stock screen protector without any text on it so that people can just leave it on for protection purposes?
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Here are all my chargers: iSDT Q6 Plus, iCharger 406 DUO, and Dynamite Passort Ultraforce 200W w/ customized firmware. The Q6 looks really tiny compared to other two. I am pretty satisfied with its size
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Last edited by neosunrise; Feb 06, 2017 at 11:30 AM.
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Feb 04, 2017, 07:26 PM
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Preprocessing
All of the iSDT chargers are different from other brands not only in size, but also the ports. They all come with two male XT60 connectors, one for input, and the other for output. Good thing about it is that you can use a big Lipo battery with XT60 connector as the power supply to charge smaller batteries, making field charge very easy and convenient. Since the charger comes with two female XT60 connectors, I need to solder some wires so I can connect the charger to my power supply.

Get the wire tinned - I believe 12AWG is more than enough to handle 14A current but I don't have the wire in this size so I went ahead and used 10AWG wires.
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Attach the opposite connector in order to avoid overheat during soldering.
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Done!
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This is the power that I used in the review. It is a modded HP server power supply.
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The charger will beep and the fan will spin for a couple of seconds when powered on.
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Long press the roller button to enter the system settings.
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There are not many setting options in the menu but it's enough.
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Multi-language support
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My Q6 has the 2.1.0.3 firmware and there is a newer version released but due to the lack of upgrade cable, I am currently not able to upgrade. I ordered one on AliExpress and hopefully I can get it within this month.
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There is a built-in self-checking program. I ran it with battery connected and it prompted me to disconnect.
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I disconnected the battery and the screen did not change. I will need to quit the current program and re-run it.
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After I restarted the program without connecting the battery, it ran for a little and gave me a message asking me to remove the batter - what's going on?
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Charge and Discharge Test
In this test, I used a Turnigy 1300mAh 3S Lipo battery to test charge and discharge functions of the charger. I first wanted to see the accuracy of the voltmeter.
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The multimeter I used is a UNI-T UT61E which provides 1mV precision when measuring voltages under 22V. This is the reading for cell 1.
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Cell 2
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Cell 3. Because Q6 can only display 2 digits after the decimal point, the accuracy is acceptable.
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Q6 provides three programs: Charger, Storage, and Discharge. They are all balanced programs, meaning that if you plug in a battery with balance plug, the programs will automatically balance each cell during the process. The beauty of this charger is that you can customize the end voltages, which I believe is not supported in 608 or 620. Here I selected 6A, around 5.5C on the 1300mAh battery.
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The current ramped up really quickly.
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It took a little over 10 seconds to reach the set current, which is 6A in this case.
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The cell voltages during the charge.
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If you roll down, you can see the internal resistance of each cell. The battery is about 4 years old so I consider the displayed values reasonable.
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Rolling down one more time shows the input and output voltages / powers. Honestly, I don't what the last two calendar-like icons mean.
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I really like the progress bar
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The charger entered the constant-voltage stage as the current is going lower and lower.
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It took around 11 mins and 40 seconds to complete the fast charge, while still maintaining the voltage. The battery is still being charged at this moment but you can disconnect it and fly with it just as is.
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I then disconnected the battery and measured the cell voltages by my multimeter. This is the first cell.
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Cell 2
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Cell 3
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Connected the battery back in and the displayed voltages were very close to the readings on the multimeter.
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In general, I think the charger did a good job in the test. My battery is old so the balance time is relatively long. The cells were well balanced after the charge was completed. Next, I tested the same battery on my iCharger 406 DUO.

The iCharger used the same 12V power supply.
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I used a parallel board as the adapter.
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These are the internal resistance readings when discharging the battery to 3.85V per cell.
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Done!
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Charge the battery with 6A, same as what I did on Q6.
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Charging in progress
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Internal resistance during the charge
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Entered the constant voltage stage
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Charge completed. The final voltages are basically the same as the Q6 but the cells were better balanced.
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Last edited by neosunrise; Feb 09, 2017 at 12:29 PM.
Feb 04, 2017, 07:29 PM
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1S Battery Test
Honestly, the most appealing feature of the Q6 charger is its small size. It would a very good choice if you want to charge smaller batteries like low capacity 1S and 2S batteries at the field. It is known that many chargers cannot charge 1S batteries properly, mostly because they fail to measure the voltage only through the charge lead.

My test did not go well at the beginning as I did not solder a separate balance plug for 1S batteries. My Q6 failed to measure voltages accurately without connecting the balance plug. The readings were about 0.2 volts off. To fix the issue, I made an adapter that provides a balance plug on top of the charge lead so that Q6 can see voltages from both the XT60 output port as well as the balance port.
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Charging in progress. The battery is a 1S 300mAh Lipo battery that I use to fly my mCP X.
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Both the charging port and the balance port are connected. This is VERY IMPORTANT when you charge 1S batteries.
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Battery was being charged at 1.2A but since the capacity was relatively small, the voltage reached 4.2V very soon. The problem here is that the internal resistance seemed no available.
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Very low charging power for the tiny batteries
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Done! It took 14 mins and 8 secs to complete fast charge from 3.80V to 4.2V. Not bad.
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It took another 10 to 20 seconds to complete the whole charge process.
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Even though the screen showed charge is completed, the charger was still charging the battery with very low current. The readings on my multimeter showed the voltage varied between 4.18V and 4.24V.
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As a comparison, I tested the same battery on my Dynamite Passport.
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Though it can measure and display the internal resistance, I am not 100% sure if the reading is accurate because it seems a bit too high.
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Misc.
In general, I think the iSDT Q6 is a great charger, especially the nice looking appearance and its size, considering it can charge at up to 300W. However, one of the problems that I have is the screen. I had to cut a screen protector for the charger so its screen won't be scratched from normal use.

The screen protector was originally for my Acer tablet and this is how it looks after I cut off the unnecessary areas.
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Done!
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The other thing I thought might be good is to resolder the wire. At the very beginning, I connected two female XT60 connecters together. After I saw some other people's wiring scheme, I decided to directly solder one of the XT60 connector to my charging lead with banana connectors.

This is what needed. I had a pair of spare HXT female connectors so they can be used here.
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XT60 female -> 4mm HXT female
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With housing installed.
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I filed the housing a little bit so the end of the connector can be as close to the end of the housing as possible.
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By doing so, I can connect my parallel charging board to the charger.
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I tested the charger by charging two parallel 3S batteries at 10A.
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The current ramped up quickly as usual. No problem at all.
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Battery internal resistance shows that they are not bad.
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Last edited by neosunrise; Feb 08, 2017 at 12:09 AM.
Feb 04, 2017, 07:42 PM
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Thread OP
Pros:
1. Small in size, good for field charge.
2. The appearance is great, compared to most chargers in the market. The user interfance is nice and easy to use.
3. Screen is great - very bright, smooth and crisp text, as well as wide viewing angle. Way better than the one on my iCharger, let alone other B&W old fashion screens.
4. It is really amazing that such a mini charger can charge up to 300W.

Cons:
1. Does not support 1S batteries very well. Can't measure the internal resistance for 1S batteries.
2. Always shows 4.2V when charge is complete - this is not true becuase multimeter showed different.
3. Self-checking sometimes incorrectly detects battery connection.
4. The plastic screen panel's material is very soft and doesn't really do a good anti-scratch job.
5. The roller button feels loose.
6. No multiple battery charge presets. The charger only remembers the current settings and if you want to charge a different battery, you need to update the parameters.

Conclusion:
This is a very nice mini charger, especially good for field charge. The price is about right. You need to use a 24V power supply to maximize its performance. Hopefully some small bugs can be fixed via firmware updates.
Last edited by neosunrise; Feb 09, 2017 at 12:40 PM.
Feb 09, 2017, 08:32 AM
On the ol' Interweb
Thanks for your honest review! It's like a feeding frenzy of folks wanting free shiznit when these things come out. I wouldn't mind all the reviews if they were actually unbiased and not afraid to point out flaws or bad points just because they got the device for free. Doesn't appear to be the case with you. Thanks again!
Feb 09, 2017, 12:46 PM
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Quote:
Originally Posted by TazRC
Thanks for your honest review! It's like a feeding frenzy of folks wanting free shiznit when these things come out. I wouldn't mind all the reviews if they were actually unbiased and not afraid to point out flaws or bad points just because they got the device for free. Doesn't appear to be the case with you. Thanks again!
No problem man. Every time I do a review, I only share what I think, not what the company who manufactures the product think. I hope my review is helpful for people who are interested in the product but have not decided if they will jump on
Feb 09, 2017, 10:27 PM
Registered User
Congrats man!
That's the way a review must be done.
Showing empirical results.
I'm bored of reviews that show the unboxing and talking wonders about beautiful screens.
Two big thumbs up!!!
Mar 04, 2017, 07:11 PM
LUFTGUCKER
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I have the ISDQ 6 charger. Charging batteries on the field do i A: connect the charger to the car battery or B: plug the AC Adaptor 100-240 volt ~1.6 A (output: 19.5 volt 3 A into the Car inverter ( max 400 watt) ? ?? would the 400watt be within limits or would something go up in smoke?
Thanks in advance to the electronic profis who understand :watts volt amps
Mar 04, 2017, 07:38 PM
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Quote:
Originally Posted by lotsasteam
I have the ISDQ 6 charger. Charging batteries on the field do i A: connect the charger to the car battery or B: plug the AC Adaptor 100-240 volt ~1.6 A (output: 19.5 volt 3 A into the Car inverter ( max 400 watt) ? ?? would the 400watt be within limits or would something go up in smoke?
Thanks in advance to the electronic profis who understand :watts volt amps
I would not use the inverter as there would be energy loss during the conversion process. You can directly connect the charger to your car battery but be careful not to overdischarge it, otherwise you won't be able to start the car
Mar 04, 2017, 08:21 PM
LUFTGUCKER
lotsasteam's Avatar
Here goes another question: over discharge the car battery? That's a 12 volt 60A battery ? How many charging cycles till this battery gets to low to start my car? Charging 1c 2200mh 11.1 volt battery with the ISDQ 6?
Last edited by lotsasteam; Mar 04, 2017 at 10:42 PM.
Mar 06, 2017, 02:54 PM
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Quote:
Originally Posted by lotsasteam
Here goes another question: over discharge the car battery? That's a 12 volt 60A battery ? How many charging cycles till this battery gets to low to start my car? Charging 1c 2200mh 11.1 volt battery with the ISDQ 6?
This is something I am not capable to answer. I will leave it to someone else who knows it. Sorry.
Mar 06, 2017, 03:32 PM
Registered User
It is not recommended to discharge a car battery by more than 30%. This would significantly reduce their service life. At 30%, you can charge your 3s battery approximately 10 times.
Mar 06, 2017, 05:47 PM
LUFTGUCKER
lotsasteam's Avatar
Thanks Rainfly! Great answer,that's a full day's task :flying 6 min{convergence) charging 1 1/2 hr ,between charges flying my electro sailplane 2hrs with thermik ,another run with the convergence ,while charging 2 3s packs flying my beaver for 8-10 min ,having a coffee break half a day gone ,still time to fly till dark ,guess im set!!
Mar 15, 2017, 05:05 PM
On the ol' Interweb
So how did you make out with the firmware update cable? What size.. 3.5mm mono or stereo plug? Update: Scratch that! I found the info needed: http://intofpv.com/t-isdt-sc-608-and...irmware-update

Did you update the firmware and if so do you know what were the changes?
Last edited by TazRC; Mar 15, 2017 at 05:57 PM.
Mar 16, 2017, 12:19 AM
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Thread OP
Quote:
Originally Posted by TazRC
So how did you make out with the firmware update cable? What size.. 3.5mm mono or stereo plug? Update: Scratch that! I found the info needed: http://intofpv.com/t-isdt-sc-608-and...irmware-update

Did you update the firmware and if so do you know what were the changes?
Q6 V2.1.0.13
Update content:
1, Optimization of the feeling while using button.
2, Optimization of fan control for discharge.
3, Optimization of erro current display.
4, Optimization of part UI display.
5, Optimization of calculation of charging power accumulation.

Honestly, the only difference that I have ever found is the fan control in discharge program. The older firmware kept the fan running from the beginning to the end of discharge while the new firmware only starts the fan when the internal temp is high enough.


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