Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)

Power Supplies
$79.99 - Motiv Power Brick Power Supply (12V/60A/720W) (addon details...)
LiPo Safe Charge Bags
$21.49 - ProTek RC Flame Resistant LiPo Charging Bag (Large, 23x30cm) (addon details...)
$60.00 - Bat-Safe LiPo Charging Case (addon details...)
Charge Leads
$14.49 - ProTek RC "Squid" Multi Connector Charge Lead (addon details...)
$15.99 - ProTek RC 2S High Current Charge/Balance Adapter (4mm to 4mm Solid Bullets) (addon details...)
Low Price: $299.99
Add To Cart Save In List
In Stock Online!
Usually ships in 24 hours
FREE Shipping Eligible!
This item is eligible for Super Saver Shipping Learn More

Junsi iCharger 406DUO DC Battery Charger. 


  • The 406DUO uses advanced Synchronous buck-boost DC/DC converter technology, high power, a high current and high-performance power conversion circuit. The maximum charge power capacity is up to 1400W, the maximum charge/discharge current of a channel is up to 40A, and two channels in Synchronous Mode are up to 70A.
  • Each channel supports 6s LiPo, Lilo, LiFe and NiZn batteries, with maximum 1.2A balance current, and adopts a unique balance calculation of internal resistance correction. Supports 1-20s NiMH/NiCd batteries and 1-12s Pb batteries.
  • With 1A/5V USB charging port, convenient for the user to charge mobile phones and PCs.
  • When the channel output connects the battery after the charger powers on, it will start automatically the anti-sparking protection.
  • Intelligent fan control. Sensing internal temperature via the internal temperature sensor, to thereby control the fan speed.
  • Internal temperature protection. When the internal temperature exceeds the Power Reduce temperature, the output power is automatically reduced; and the charger will shut down when temperature exceeds the Shut-down temperature.
  • This charger can save 64 parameters sets and support the data import/export to SD card.
  • A 2.8-inch LCD screen provides rich information including current, voltage, power, capacity, internal resistance, control status, time-consuming and temperature, etc.
  • Multi-discharge features: self-discharge, regenerative to input discharge, and lithium battery extra expanding discharge.
  • Supports measurement for internal resistance of battery offline and online. Can measure not only the internal resistance of the entire battery pack, but also measure the internal resistance of each cell within the lithium battery.
  • The iCharger has protection for reversed polarity (input or output), input voltage/current, battery temperature, charging capacity, overrun time and maximum power etc.
  • Supports upgrading the hardware program by USB port or SD card. The iCharger also supports the “Logview” software and can display, plot and analyze the charge and discharge data by it.

Net weight: 0.91kg
Dimension: 171×118×59 ±0.5mm
Input Voltage Range: 10.0—30.0VDC
Maximum Input Current Limit: <60A, CH1/2<47A
Maximum Charge/Discharge Current: 70A in sync mode, 40A in async mode
Maximum Charge Power Capacity: 1400W (Channel 1000W @input > 23.5V)
Maximum Discharge Power Capacity: 140W (Channel 80W)
Maximum Regenerative Discharge Power Capacity: 1400W (Channel 1000W)
Maximum Extra Discharge Power Capacity: 2000W (Channel 1000W @25V/40A)
Maximum Current Drain for Balancing: 2.4A in sync mode, 1.2A in async mode
USB Charging Port: 5V/1A(current-limiting protection 1.2A)


  • (2) Open ended 12awg charge leads
  • (2) Balance board connector cables
  • (1) 2 in 1 XH/EH type 2S/6S balance board
  • (1) Open ended power supply cable

Warranty Information: Please note for this particular unit, A-Main Hobbies does not handle the warranty service and will need to ship the unit to Junsi for repair or replacement. For this reason, we ask that you please allow 3-4 weeks for warranty service.

WARNING NOTE: This charger is not compatible with Traxxas iD equipped LiPo Batteries; only Traxxas iD chargers properly charge Traxxas iD LiPo Batteries. NEVER, UNDER ANY CIRCUMSTANCES, use this charger to charge a Traxxas iD equipped LiPo Battery.

This product was added to our catalog on January 26, 2016

Verified Owner
Friday, Jan 5 2018 (about 2 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
I bought this charger about a month ago here on the site
I'm so pleased with this crazy charge!
I'll sum it up in three words. Small, strong, smart!
Worth every dollar!
Throws all the toys (chargers) I have in the trash (:

incidentally. There is software update 2.18 for LiHV battery
Verified Owner
Friday, Apr 27 2018 (about 2 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
It took me quite awhile to realize the potential and justify the price of a high end charger, but after seeing for myself from my fellow racers what a charger like this can do, I was convinced. I purchased my iCharger 406Duo here from Amain Hobbies. I haven't had it very long but so far Hands down THE best charger I have ever owned. It actually stays on the charge or discharge current you set it on (unlike my Hitec) and will significantly reduce your charging, discharging or cycling times. I feel that this charger is so much more accurate which is very important to me because I have a lot of money invested in race lipo packs and I want the best performance possible out of them and I want them to last.
Saturday, May 30 2020 (6 days ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
I've had 2 for several years, and they're still going strong. Hundreds and hundreds of charges with the best charging algorithms available. I even modded my older one with a more powerful fan setup to help increase discharge rates. I'm here writing this review because I'm considering purchasing another for a smaller charge case build (I need at least two channels or I'd grab an i6).

I love these things!
Verified Owner
Tuesday, Apr 28 2020 (5 weeks ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Wow, this is a great little charger! The capabilities of this thing are awesome. The reason I purchased this charger was for it”s 40 amp discharge/charge rate.
By cycling a couple of 2S lips packs just one time, it brought down the internal resistance of the packs dramatically. Which if you’re racing stock class 17.5 it makes a huge difference. I noticed more “punch ” from the packs immediately and not to mention that the charge time is a fraction of what it usually takes to fill a pack using one of the common four button units out there.
The menu layout takes a little getting used to, but once you do it’s actually very user friendly.
Just keep in mind that you will need to pick up a power supply, and if you plan to use the high discharge function you will also need a discharge bank. I recommend RL Power, he has really nice stuff that’s fair priced and he shipped the items out right away.

Bottom line, I highly recommend this charger if you’re looking for something with higher capabilities, no disappointments.
Verified Owner
Saturday, Apr 25 2020 (6 weeks ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
top of the line charger great unit , not so great they do not include the bullets to mount on your power supply you have to get those separately , no instruction manual just a disk , tried to play the disk laptop didn't like it so I will have to get help from others that have the same charger.
Verified Owner
Saturday, Apr 11 2020 (8 weeks ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Great full function charger. If you're particular about how you treat your LiPo's, this charger has the ability to let you set your preference. If you just want a charger that works with minimal fuss, this charger can get you charging in 3 clicks. If you want the highest charge rate you can get away with, this charger can hit up to 40A. It's up to you how you use this charger, and how you treat your batteries, this charger just won't hold you back if you "know better" than a default profile.

A quick note, a balance lead extension is a lot easier to deal with than the combined balance board included. I mostly charge 2s batteries for racing, so a balance lead extension with the left top index lug xacto cut off fits great, and fits all the connections inside a lipo sack.

Really like this charger a lot, nothing to complain about yet.
Verified Owner
Monday, Apr 6 2020 (9 weeks ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
I got the charger an didn't have the balance broad cables in it. I call an they said they would send them two weeks ago . An still have not received them .
I cant us it until i get the cables. Can someone please check on it and call me? Kirk 504-415-7319
Verified Owner
Thursday, Apr 2 2020 (2 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Because my first charger, the 208B, was a very good charger, my next one would be an iCharger. I am not an expert user and don’t want to be, but this charger accomplishes what I want it to. That is, to charge my 6S LiPos independently of each other in a safe, rapid succession.
Naming convention interprets the 406 Duo as having Dual (Duo) output ports at 40 Amps each for charging up to 6S Li-Po packs. Charges LiPo, Lilo, LiFe and NiZn, NiMH/NiCd, Pb.
Pricey? Yes, but I trust Junsi iCharger products, I like to have more than I can handle, I like to get lots of years of use, and I feel I am getting what I paid for.
Surprisingly small housing. Has more features than I want to get into within the first months of use. The colorful screen displays readings for each cell while charging, and it provides IR readings per pack and for each cell. Thanks to having owned the 208B, learning the basic 306 Duo’s screens was a lot easier than I had read about in customer reviews. The knob and buttons took me about 1 hour of use to be comfortable with. With some use, I will explore beyond the basics to uncover its powerful feature set.
Gripes? Not mentioned or noticed was that the 306 Duo does not come with banana leads to plug into my PSU. Understandably, the buyer has to supply/solder these. 10AWG cables with pre-tinned ends are supplied, and luckily, I had spare solderable 4mm banana plugs. Had to drill them out to 3/16” to easily insert that 10AWG wire. Included are other cables as well as the balance board. This is as complete a package as I expected.
The iCharger 306 Duo does what I planned to do with it. That is, I fly with LiPo pack 1, Land, Charge. While that is charging, I fly with LiPo pack 2, Land, Charge. While that is charging, I fly with LiPo pack 3, Land, Charge. Repeat.
I really believe that I made a good choice which will yield just as many years, if not more, than my first iCharger.
Thanks to Amain for carrying the 306 Duo, the easy-to-navigate website, great prices, easy checkout, secure packaging, and fast shipping.
Verified Owner
Friday, Mar 27 2020 (2 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Fantastic charger, was using the isdt for more than a year, no comparison, 70A, 1400W is rediculous, and ways more functions then a "average" charger, I can fully carger a 7600mah in 10 minutes and discharge from full to stoarge in 5 minutes with a resistor on the other channel, overall, this charger makes charging and discharging so much fun!
I enjoyed it!
Verified Owner
Thursday, Feb 20 2020 (3 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Once I learned how to use it I it does everything I need it to do and more. Awesome charger I would highly recommend it.
Verified Owner
Monday, Jan 13 2020 (5 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
I recently upgraded from a venom pro duo to the iCharger 406 duo. My whole nuclear family is involved in RCs now (epic win), and now that 4 people in one house each have their own cars and batteries it was becoming a struggle for me to stay on top of the family's charging needs. Getting 14-18 batteries ready for a day out was literally a 7-8 hour process, and if we didn't use all the packs due to rain or a breakage, getting the unused packs to storage was even worse.

The 406 duo 40a capabilities allow me to parallel balance charge about 16 packs from storage in less than 2 hours. When we're done for the day, I can discharge unused packs at high speed by using the ichargers regenerative discharge capabilities - essentially dumping unused packs into used packs, getting everything back to storage voltage incredibly quickly.

With a good power supply (I'm using a 24v 40a 1000w server psu) the 406 duo is a fully race day capable setup as well - letting you purposefully cycle packs to lower IR, or just continually charging as you go. If you have about 10, 10 minute packs you are all day capable.

This is a premium price charger but for very good reason. I would recommend this product to anyone who is even moderately invested in the hobby.
Verified Owner
Monday, Dec 30 2019 (5 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Really good item
Verified Owner
Monday, Aug 5 2019 (10 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
always a good experience at A Main. Like dealing with this company for my rc racing needs.
Verified Owner
Tuesday, Jul 30 2019 (10 months ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Very nice charger. Works as expected.i would definitely recommend this. It will charge two batteries at the same time. It will also discharge and cycle your batteries.
Thursday, Nov 1 2018 (about a year ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
So far so good, I picked up one in the scratch and dent section here. :). Although got ripped off with import duty to the U.K. as usual (of course not A-mains fault). Appears a very good and fairly easy to use charger I’d my first impression. I’ll probably not be charging at really high amps anyway so my power pack isn’t the strongest but nonetheless works well. Would have liked the balanced charge leads included ideally. So far so good though. It’s a popular choice and I thought there must be a reason.
Monday, Sep 4 2017 (about 2 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Monster of a charger. I’ve had a 306 for a long time after getting tired of all the wimpy multichannel 100w chargers than can’t charge or discharge in any reasonable amount of time if you’re racing 1/8 scale with bigger 4s packs. The 306 was/is a monster but I picked this up because between starter boxes, radios, e buggy, rx packs, and kids 1/10 mod 4wd buggy one channel was killing me no matter how strong it was.

This thing fits the bill. Took a few minutes to work through the menu (who reads directions anyway right?) after every Lipo Charger I’ve had for a long time have all been the same 4 button setup. Once you get this monster figured out though look out. It gives you every bit of data you could need on a nice color screen at the push of a button and has all the power you need to charge everything from starter boxes to 4s packs in short order and giving you all the data you could want on battery health while you’re at it. Highly recommended.
Verified Owner
Saturday, Mar 11 2017 (about 3 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
i love this charger! the nice small size and the big power and all the features make this a valuable asset at the track,it does take some getting used to all the features and navigating it but once you do you will love it and never look back.
Tuesday, Nov 15 2016 (about 3 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
Love my icharger. This unit is great, 2 charger ports and the size of 1 charger. Amazing accuracy and for me, peace of mind when charging. The menu logic is a little tricky to navigate at first, knowing which buttons to get into menu and then the push/click wheel...but I got it finally. Very happy and worth the $$.
Verified Owner
Saturday, May 14 2016 (about 4 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
If you want one of the best chargers on the market, look no farther than one of these awesome iChargers.
My FMA power lab 6 has all the abilities this one does, but the iCharger is hands down the winner in build quality and user friendliness with a very clear to read backlit color screen to boot.
The specs on this bad boy is more than most people would ever need in most situations. EXACTLY! (Tim Allen grunting!)

Even has a 5v 1 amp USB on the back so you can charge a phone.
Has a micro usb to PC communications input as well as a micro SD socket for saving raw data.

The one thing to note is how much smaller this charger is that what I expected it to be, even when looking at videos and pics it just looks much larger than it actually is. It is roughly 2/3 the size of my powerlab 6, yet has two channels.
Verified Owner
Wednesday, Apr 20 2016 (about 4 years ago)
Junsi iCharger 406DUO Lilo/LiPo/Life/NiMH/NiCD DC Battery Charger (6S/40A/1400W)
This charger is great. Gives all the info you could want. Takes a little time to get use to but once you learn the functions it's super easy to use.