Upgrade DUO to 4S v2


  • Place an order for the upgrade of your discharger.
  • Once you’ve ordered, send us your old regenerative.
  • We’ll upgrade your DUO to the latest 4S version.
  • We’ll reuse your existing battery for the new 4S model.

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Upgrade your Regenerative Discharger DUO to Regenerative Discharger 4S v2

If you have an old Regenerative Discharger DUO, we can upgrade it to the latest Regenerative Discharger 4S. The new version is not only more beautiful but also 20 ounces lighter, smaller, quieter, and more powerful. Order the upgrade and send us your discharger and we will upgrade it to the latest version of our Regenerative Discharger 4S. We will reuse your battery for the new version. Here are the exciting features of the new version:

  • Compatibility Beyond Limits: The Regenerative Discharger 4S is the first-ever battery discharger compatible with all Junsi iCharger models, including the 456DUO, 458DUO, 4512DUO, 406DUO, 308DUO, 4010DUO, DX6, DX8, DX12, S6, X6, X8, and X12. Whether you’re a professional pilot or a hobbyist, this compatibility ensures seamless integration with your existing setup.
  • Dual Charging Power: Imagine cycling, discharging, and/or charging two batteries (2S) simultaneously up to 45A using both outputs on your iCharger DUO. The Regenerative Discharger 4S makes this dream a reality.
  • Synchronous Mode Advantage: Unlike any other discharger, ours is compatible with the Synchronous mode of your iCharger DUO, allowing you to discharge a battery (2S) up to 70A. Say goodbye to limitations and hello to unprecedented power management.
  • All-in-One Solution: No need for a second device to test and compare your batteries’ capacity and internal resistance. With Regenerative technology, you’ll achieve a lower internal resistor compared to a traditional resistor bank.
  • Internal Resistance Reduction: At various cycles, our discharger significantly reduces your battery’s internal resistance, resulting in more speed, power, and longer battery life.
  • Eco-Friendly Energy Recovery: Not only does it discharge, but it’s also environmentally conscious. It recovers energy during discharge and reuses it during charging.
  • Space-Saving All-in-One Design: Our clean and neat design features short wires and optimizes space. It holds both the charger and power supply, streamlining your setup.
  • No Resistor Banks, No Hassle: Forget about disconnecting resistor banks after discharge. Our discharger works seamlessly with the Cycle mode on your iCharger S6/X6/X8/X12. No fuss, no resistors, and no excessive heat.

Upgrade your old DUO to the Regenerative Discharger 4S and experience the revolution in battery management!

Batteries MACLAN Graphene V3 HV LCG Stick 6800 mAh and MACLAN Graphene V3 HV 2S Shorty 6100 mAh during my test.
See the Regenerative Discharger video for two iCharger X6/X8.

Regenerative Discharger usage directions and specifications:

  • Cycle Mode: Utilize only the “Cycle” mode on your charger. This mode automatically discharges and then charges your battery. It helps maintain battery health and balancing cell voltages.
  • Storage Mode: At the end of the day, switch to the “storage” mode. This mode maintains the battery at an optimal voltage level for storage. It’s especially useful when you won’t be using the battery for an extended period.
  • Single Battery Per Car: For optimal performance, dedicate one battery per car. Avoid alternating between multiple batteries. This consistency helps maintain balanced cell voltages and extends battery life.
  • Avoid Excessive Discharge: Do not use several times in a row the “Discharge” mode from your charger.

*All iChargers shown for reference only. iCharger is not included with the Regenerative Discharger. **With the iCharger DX6/DX8/DX12/X6/X8/X12 or the 308DUO you can discharge or charge at 30A . ***1S-2S only with the Synchronous Mode icharger.  50A on iCharger 308DUO, DX6, DX8, DX12 and 70A on iCharger 456DUO, 458DUO, 4512DUO, 406DUO and 4010DUO.

Regenerative Discharger 4S Made in USADesigned by Enthusiasts, Made in the U.S.A.: The RC Regenerative Discharger is the brainchild of passionate RC enthusiasts. Crafted with precision in the United States, it embodies quality and innovation.

Feel free to contact us for more details!

Additional information

Weight 75 oz
Dimensions 7.36 × 4.72 × 4.72 in
Battery supported

1 battery 4S or 2 batteries 2S at the same time

AC input

AC input 100-240VAC

Discharger Color

Black, Blue, Cyan, Green, Grey, Lime Green, Magenta, Orange, Pink, Purple, Red, White, Yellow

Icharger Stand

456DUO, 406DUO, 458DUO, 308DUO, 4512DUO, 4010DUO, DX6, DX8, DX12, S6, X6, X8, X12, Double S6, Double X6, Double X8, Double X12

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