G8 DUO 1400W

Oct 27 2015 release


Congratulations on your choice of G-FORCE G8 Duo 1400W Balance Charger/Discharger. This unit is simple to use, but the operation of a sophisticated charger such as G-FORCE G8 Duo 1400W does require some knowledge on the part of the user. These operating instructions are designed to ensure that you quickly become familiar with its functions. It is therefore important that you read right through the Operating Instructions, Warning and Safety Notes before you attempt to use your new charger for the first time. We hope you have many years of pleasure and success with your new battery charger.

G-FORCE G8 Duo 1400W also has some new features and functions. Users could set the terminal voltage by themselves and connect it to PC for PC control and firmware upgrade. And it comes with Synchronous Mode: When charging two same batteries, both charging channels can be set by channel one. What's more,
users could also use it as Lithium Battery Meter and Lithium Battery Internal Resistance Meter. There are Automatic Charging Current Limit, Capacity Limit, Temperature Threshold and Processing Time Limit which makes the charger safe to use.

G8 Duo 1400W employs the circuit that features output power of 700W X2 watts. It can charge 20 cells of NiCd/NiMH or 8 series of Lithium batteries with maximum current of 30A. G8 Duo 1400W has an individual cell voltage balancer, so it does not required any balancer separately when charging Lithium batteries (LiPo/LiIon/LiFe) for voltage balancing.

Reliable/durable membrane button systems are using for charger controls. The fan cooling system is so smart and efficiently. The fan speed is controlled by internal temperature sensor.

Name of each department


  • G-FORCE G8 Duo 1400W Charger
  • 2-8S Multiple Balance Board Adapter x 2
  • Insulated Banana to XT60 BatteryConnector x 2
  • Charging Cable with Insulated Banana Connector x 2
  • Large Crocodile Clip
  • DC Input Connector (50A/XT90)

Product Specification

DC Input Voltage 11-30V
Controls Button
Display Type 2x16 LCD
Display Backlight Blue
Case Material Metal
Cooling System Built-in fan x2pc
Case Size 200x140x55mm
Weight 1220g
External Port Balance Socket-XH, Temperature Probe Socket,
Battery Socket, DC Input, Micro USB Port for PC Control
Delta Peak Detection NiMH/NiCad: 3-15mV/cell (Default 4mV/cell)
Charge Cutoff Temperature 20-80ºC(adjustable)
Charge Voltage NiMH/NiCad: Delta peak detection
LiPo: 4.18-4.3V/cell LiIon: 4.08-4.2V/cell
LiFe: 3.58-3.7V/cell LiHV: 4.25-4.35V/cell
Balance Current Max. 800mA/cell
Trickle Current for NiMH/NiCad 50-300mA & OFF
Reading Voltage Range 0.1-34.8V/cell
Battery Types/Cells LiPo/LiIon/LiFe/LiHV: 2-8cells
NiMH/NiCad: 1-20cells Pb: 2-24V
Battery Capacity Range
LiPo/LiIon/LiFe/LiHV: 100-50000mAh
Pb: 100-50000mAh
Charge Current 0.1A-1A (±0.3A) 1.1A-30A (±10%)
Safety Timer 1-720minutes off
Charge Wattage 700W x 2
Discharge Current 0.1A-5A (±10%)
Balance Port Discharge Current 10-500mA
Discharge Cut-off Voltage NiMH/NiCad: 0.1-1.1V/cell
LiPo: 3.0-3.3V/cell LiIon: 2.9—3.2V/cell
LiFe: 2.6-2.9V/cell LiHV: 3.1-3.4V/cell
Pb: 1.8V
Discharge Wattage 30W X2
Balance Cells 8 cells
Memory 10 different charge/discharge profiles in each channel
Charge Method CC/CV for lithium types and lead (Pb) batteries
Delta-peak Sensitivity for NiMH/NiCad.
Standard Battery Parameters
Nominal Voltage 3.7V/cell 3.6V/cell 3.3V/cell 3.7V/cell 1.2V/cell 1.2V/cell 2.0V/cell
Max Charge Voltage 4.2V/cell 4.1V/cell 3.6V/cell 4.35V/cell 1.5V/cell 1.5V/cell 2.46V/cell
Storage Voltage 3.8V/cell 3.7V/cell 3.3V/cell 3.85V/cell n/a n/a n/a
Allowable Fast Charge ≦1C ≦1C ≦4C ≦1C 1C-2C 1C-2C ≦0.4C
Min. Discharge Voltage 3.0-3.3V
Manual Download
English Manual (PDF).