SkyRC – D400 Ultimate Duo 400W – Balance Charger / Discharger / Power Supply


COD: 3SK1022 Categoria: Tag: , , , ,


Intelligent two channel charger and discharger SKY RC Ultimate Duo 400W (D400) with built-in balances up to 200 W per channel for all types of batteries (NiMH, NiCd, Li-poly, LiHV, Li-ion, Li-Fe and Pb) DJI accumulators (TB47, TB48, TB47S, TB48S). The charger is designed for mains supply from 100-240 V / 50-60 Hz, from a lead-acid 12 V battery (battery or traction lead-acid accumulator) or a suitable stabilized power supply (11-18 V / 30 A). Unlike a large number of chargers with a built-in D400 power supply, you can achieve full power for charging when powered from an internal power supply.

The D400 is equipped with a truly intelligent, user-friendly software that offers a number of very useful features and has several welcome news:

  • Program for new types of “high-voltage” lithium LiHV lithium batteries with terminal voltage for charging up to 4.35 V
  • Power distribution between the two channels – you can freely adjust the power ratio of the channels 1 and 2 (the sum of the outputs of both channels is max. 400 W, channel 2 is max. 200 W) or you can switch off channel 2 altogether and channel 1 up to 400 W
  • Possibility of synchronous charging of both channels for charging two batteries of the same type (excellent for charging large batteries consisting of two sets with half of cells – eg 2x 3S, 2x 5S, 2x 6S etc.)
  • Program for charging Intelligent Power Accumulators DJI (TB47, TB48, TB47S, TB48S)
  • Charging and Discharging Charging and Discharging Charges for Lithium Batteries (allowing for more fueling charging for the flight crew or brutal overcharging that “haulers” want)
  • Balancer with high load capacity (up to 500 mA per channel)
  • Measurement of total voltage and voltage of individual cells (for lithium batteries) and off charging / discharging
  • Measuring the internal resistance of the whole set and individual cells (for lithium accumulators)
  • Micro USB port for PC communication and firmware update
  • Channel 2 can serve as a stabilized source with an output voltage adjustable in the range of 6-15 V with a maximum current of 10 A (max.” Power 150 W) to power other electrical devices

Of course there are no sockets for temperature sensors.

  • Input power supply 11 – 18 V dc
  • For charging and discharging 1 – 18 NiCd / NiMH cells, 1-7 Li-ion / Li-poly / Li-Fe / LiHV cells or 2- 24V lead-acid batteries
  • Adjustable charging current (0.1 A – 20.0 A) in increments of 0.1 A
  • Adjustable discharge current (0.1 A – 5.0 A)
  • Max. The power for channel 1 charging is 400 W (channel 2 off), the maximum power in channel 2 is 200 W, the power ratio is adjustable (total maximum power is 400 W)
  • Max. Power for discharge of 36 W per channel
  • Automatic charging and discharging mode for NiCd, NiMH with adjustable current limit
  • Termination of charging by the delta-peak for NiCd and NiMH accumulators
  • Lithium and Pb accumulators are charged using the “Constant Current / Constant Voltage”
  • Adjustable sensitivity of delta-peak detection for NiCd and NiMH accumulators
  • Adjustable terminal voltage for charging and discharging for lithium batteries
  • Possibility of synchronous charging of both channels for charging two batteries of the same type
  • Repeated cyclic charging / discharging or discharging / charging operations for NiCd and NiMH accumulators up to 5 cycles
  • Four charging modes for lithium batteries – normal charging, fast charging, charging with balancing, storage charging / discharging.
  • End charging when the set time, charge charge or cut-off temperature is exceeded.
  • Memory for 10 charging / discharging programs per channel.
  • Measure the total voltage of the set and individual cells (for lithium batteries)
  • Measure the total internal resistance of the set and individual cells (for lithium batteries)
  • Possibility to use channel 2 as a stabilized source with an output voltage adjustable in the range of 6-15 V with a maximum current of 10 A (max.” Power 150 W) to power other electrical devices
  • Socket for temperature sensor
  • Micro USB port for PC communication and charger control by Charge Master and charger firmware update
  • USB power output 5.0 V / 2.1 A for power / charging of mobile phones, tablets and similar devices
  • Two two-line backlit LCD displays with simple, easy-to-read menu and parameter display during charging / discharging
  • A number of warning text messages are contributing to safe operation – incorrect input voltage, poor wiring, unsuitable battery or condition, incorrect polarity at output
  • Protection against reverse polarity and short-circuit at output.
  • Compact aluminum cabinet
  • Built-in ventilators for forced cooling


The charger is equipped with a JST-XH service connector, the 2-7S adapter for JST-XH connectors is part of the charger kit.

You can purchase a temperature sensor to measure the temperature of the charged / discharged batteries.

Note: When charging lead-acid accumulators, the charger uses a terminal voltage of 2.40 V / cell – that’s why it is suitable for charging classic lead-acid batteries and rechargeable gels with reversible valve. To charge gas-tight gel accumulators that can not be charged at more than 2.30 V / cell, is not suitable.


The charger kit includes: Ultimate Duo 400W Charger, 2x JST-XH Lithium Kit Adapter (2-7s), 2x 4mm Banana / XT60 Charging Cable, 2x Banana / Free-Termination Charging Cable, AC Power Cable and Instruction Manual.

Input Voltage (Car Battery – DC) [V]11 – 18
Input Voltage (AC – AC) [V]100-240
Charging current channel 1 [A]0.1 – 20
Charging current channel 2 [A]0.1 – 20
Charge power channel 1 [W]200-400
Charge power channel 2 [W]200
Discharge current [A]0.1″ – 5
Discharge power [W]36
Number of channels2
NiCd [Article]1 – 18
NiMH [Article]1 – 18
Li-Pol [Article]1-7
Li-Ion [article]1-7
Li-Fe [Article]1-7
Li-HV [Article]1-7
Pb [article]1 – 12
Balancing current [mA]500
Length [mm]228
Width [mm]194
Height [mm]82.5
Weight [g]2510