Hi-Tec RDX1 Mini User manual

INSTRUCTION MANUAL
WARNING: THE CHARGING AND DISCHARGING OF RC HOBBY BATTERIES CAN BE DANGEROUS. FAILURE TO FOLLOW
THE INSTRUCTIONS AND WARNINGS IN THIS MANUAL MAY RESULT IN PROPERTY DAMAGE AND/OR LOSS OF LIFE.

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Table of Contents:
Introduction..................................................................................................................................03
Warning and Safety Notes.....................................................................................................04
Product Layout............................................................................................................................08
Specications................................................................................................................................09
Features..........................................................................................................................................10
Battery Connections................................................................................................................12
Input Functions ..........................................................................................................................13
Program Flow Chart..................................................................................................................14
Charger Operation....................................................................................................................16
Memory Preset - Data Store/Load......................................................................................18
Battery Meter...............................................................................................................................20
Battery Resistance Meter........................................................................................................21
Advanced System Set Up........................................................................................................22
Warning and Error Messages................................................................................................24
Commonly Used Terms............................................................................................................25
Conformity Declarations........................................................................................................27
Disposal and Prop 65 Warning............................................................................................28
Warranty and Service...............................................................................................................28
Table of Contents

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Congratulations on purchasing Hitec’s RDX1 Mini compact charger! Featuring a
compact design , this sophisticated AC charger packs 65 watts into a fraction of
the size to meet your battery management requirements. Compatible with a full
range of the most popular battery types, including the new generation LiHV, the
RDX1 Mini keeps your batteries powered up with 6-amps of charging power.
Although simple to use, the RDX1 Mini does require some background
knowledge for successful and safe operation. The operating instructions
included here are designed to ensure that you quickly become familiar with
its functions. It is important that you read through the Operating Instructions,
Warning and Safety Notes attentively and in full before attempting to use your
new charger for the rst time. By following the guidelines and recommendations
provided, you are sure to enjoy many years of R/C fun with your RDX1 Mini
charger!
THE CHARGING AND DISCHARGING OF RC HOBBY BATTERIES CAN BE
DANGEROUS. FAILURE TO FOLLOW THESE EXPLICIT WARNINGS CAN
RESULT IN PROPERTY DAMAGE AND/OR LOSS OF LIFE.
ANEVER LEAVE YOUR CHARGER UNATTENDED WHILE IN OPERATION.
ANEVER CHARGE ON OR AROUND COMBUSTIBLE MATERIALS.
ANEVER CHARGE A DAMAGED BATTERY PACK.
ALOW COST, NO-NAME BATTERY PACKS POSE THE MOST DANGER. WE
RECOMMEND YOU ONLY USE BATTERY PACKS THAT ARE SOLD AND
WARRANTIED BY A REPUTABLE COMPANY.
AIT IS HIGHLY RECOMMENDED THAT YOU UTILIZE A SAFETY DEVICE SUCH
AS A STEEL CASE OR LIPO SACK™ WHILE CHARGING LITHIUM CHEMISTRY
BATTERIES.
AIT IS HIGHLY RECOMMENDED THAT YOU KEEP AN OPERABLE“CLASS A” FIRE
EXTINGUISHER IN THE CHARGING AREA.
FAILURE TO FOLLOW THESE WARNINGS CAN BE CONSIDERED
NEGLIGENCE BY THE OPERATOR AND MAY NEGATE ANY CLAIMS
FOR DAMAGES INCURRED.
Warning
Introduction
Warning

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These warnings and safety notes are of the utmost importance. You must follow
these instructions for maximum safety. Failure to do so can damage the charger
and the battery and in the worst cases, may cause a re.
NEVER LEAVE THE CHARGER UNATTENDED WHILE IT IS CONNECTED TO
ITS POWER SOURCE. IF ANY MALFUNCTION IS FOUND, TERMINATE THE
PROCESS AT ONCE AND REFER TO THE OPERATION MANUAL.
AThe allowable AC input voltage is 100-240V AC.
AKeep the charger away from dust, damp, rain, heat, direct sunlight and
excessive vibration.
AIf the charger is dropped or suers any type of impact, it should be inspected
by an authorized service station before using it again.
AThis charger and the battery should be put on a heat-resistant, non-
ammable and non-conductive surface.
ANever place a charger on a car seat, carpet or similar surface. Keep all
ammable volatile materials away from the operating area.
AMake sure you know the specications of the battery to be charged or
discharged to ensure it meets the requirements of this charger. If the
program is set up incorrectly, the battery and charger can be damaged.
AFire or explosion can occur due to overcharging.
Warning
Warning: Be sure to read this section for your own safety.
Caution: Be sure to read this section to prevent accidents
and damage to your charger.
Tip: This section will help you maximize the performance of
your charger.
Note: This section will provide more detailed explanations.
Caution
TipWarning
Note
Warning and Safety Notes
Hitec RCD USA will not be held responsible for any damages or injuries that may
occur by persons who fail to follow these warnings or who fail to properly follow
the instructions in this manual.

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ATo avoid a short circuit between the charge lead, always connect the charge
cable to the charger rst, then connect the battery. Reverse the sequence
when disconnecting.
ANever attempt to charge or discharge the following types of batteries:
• A battery tted with an integral charge circuit or a protection circuit
• A battery pack which consists of dierent types of cells (including
dierent manufacturer’s cells)
• A battery that is already fully charged or just slightly discharged and
non-rechargeable batteries (these pose an explosion hazard)
• A faulty or damaged battery
• Batteries installed in a device or which are electrically linked to other
components
• Batteries that are not expressly stated by the manufacturer to be
suitable for the currents the charger delivers during the charge process
PLEASE BEAR IN MIND THE FOLLOWING POINTS BEFORE YOU
COMMENCE CHARGING:
• Did you select the appropriate program suitable for the type of battery you
are charging?
• Did you set up the adequate current for charging or discharging?
• Have you checked the battery voltage? Lithium battery packs can be wired
in parallel and in series, i.e. a 2-cell pack can be 3.7V (in parallel) or 7.4V (in
series).
• Have you checked that all connections are rm and secure?
• Make sure there are no intermittent contacts at any point in the circuit.
Warning and Safety Notes [cont.]

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LiPo LiPo HV LiIon LiFe NiCd NiMH Pb
Nominal
Voltage
3.7V/cell 3.7V/cell 3.6V/cell 3.3V/cell 1.2V/cell 1.2V/cell 2.0V/cell
Max. Charge
Voltage
4.2V/cell 4.35V/cell 4.1V/cell 3.6V/cell 1.5V/cell 1.5V/cell 2.46V/cell
Storage
Voltage
3.8V/cell 3.85V/cell 3.7V/cell 3.3V/cell n/a n/a n/a
Allowable Fast
Charge
≤ 1C ≤ 1C ≤ 1C ≤ 4C ≤ 1-2C ≤ 1-2C ≤ .04C
Min. Discharge
Voltage
3.0-3.3V/cell 3.1-3.4V/cell 2.9-3.2V/cell 2.6-2.9V/cell 0.1-1.1V/cell 0.1-1.1V/cell 1.8V/cell
Standard Battery Parameters
WHEN ADJUSTING YOUR RDX1 MINI CHARGING PARAMETERS, BE SURE
YOU SELECT THE PROPER BATTERYTYPE AND CELLVOLTAGE FOR THE TYPE
OF CELL YOU ARE CHARGING. CHARGING BATTERIES WITHTHE WRONG
SETTINGS MAY CAUSE THE CELLS TO BURST, CATCH FIRE OR EXPLODE.
Charging
Before charging your batteries, it is critical that you determine the maximum
allowable charge rate for your batteries. The RDX1 Mini is capable of charging
at high rates that may not be suitable or safe for your particular batteries. For
example, Lithium cells are typically safe to charge at 1C, or the total mAh÷1000.
A 1200mAh battery would have a 1C charge rate of 1.2 amps. A 4200mAh
battery would have a 1C charge rate of 4.2 amps. Some manufacturers are
oering Lithium cells that can be charged at greater than 1C but this should
ALWAYS be veried before charging a Lithium battery at rates higher than 1C.
Voltage is just as critical as the charging amperage rate and this is determined
by the number of cells in series, or“S”. For example, a 3S LiPo is rated at 11.1 volts
(“S”multiplied by a single LiPo cell with a nominal voltage of 3.7 volts DC. 3 cells
x 3.7 volts each equals 11.1 volts DC).
Connect the battery’s main leads to the charger output: red is positive and
black is negative. Keep in mind that the gauge or thickness of your charging
leads from the RDX1 Mini to your battery must be of an acceptable current
rating to handle the applied charge current. For maximum safety and charging
eectiveness, always match or exceed the main battery lead rating when
assembling or selecting your charging leads. If you charge a battery at a high
current rate (amperage) with a charging lead not rated for the chosen amperage,
the wire could get hot, catch re, short out and/or potentially destroy your
battery and the charger.
Warning
Warning and Safety Notes [cont.]

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When in doubt, always use a higher gauge wire (lower AWG number). It is
common to see charging leads constructed of 14AWG, 16AWG or 18AWG wire.
Always refer to recommendations from your battery manufacturer for your
specic battery type and size before initiating a charge or discharge process.
Do not attempt to disassemble or modify Lithium or Lead-Acid battery packs.
Discharging
The RDX1 Mini discharging functions are for two specic purposes:
• Refreshing the capacity of a Nickel-based battery that has lost capacity over
time (NiMH or NiCd).
• Reducing the voltage of a Lithium battery for safe storage.
LITHIUM CHEMISTRY BATTERY PACKS SHOULD ONLY BE DISCHARGED
TO THEIR MINIMUM SAFE VOLTAGE, NO LOWER. DEEP DISCHARGING
A LITHIUM CELL WILL DO PERMANENT DAMAGE. REFER TO THE
STANDARD BATTERY PARAMETERS TABLE ON PAGE 6 OF THIS MANUAL
FOR MINIMUM DISCHARGE VOLTAGES.
LiPo & LiHV Charge/Discharge Cycling
Lithium batteries are known to reach full capacity after a break-in period of
about 10 charge/discharge cycles. We do not recommend you use the RDX1
Mini charger to do this; normal use and recharging will achieve the same results.
If you wish to perform a Lithium break-in on the bench with the RDX1 Mini,
discharging to minimum acceptable voltages and performing a balance charge
at 1C maximum rate is recommended. If you choose to break in your Lithium
batteries under normal use, charging at only 1C for the rst ten cycles will help
ensure full performance and service life from your Lithium cells.
Warning and Safety Notes [cont.]
Note

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Product Layout
1. RDX1 Mini Charger
2. AC Cord
3. 2 PIN T-TYPE Charge Connector
123
AC Input (100-240V)
Balance
Lead
3.2” SCREEN
Temperature
Sensor Port
Battery Connector
XT60 Female
Ventilation
Fan

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Specications
AC Input Voltage 100 - 240V
Charge Power 65W
Charge Current Range 0.1-6.0A
MAX Discharge Power 10W
Discharge Current Range 0.1-2.0A
Balancing Port Current Drain 200mA/CELL
Trickling Charging Current 50mA-300mA & OFF
NiCd/NiMH Battery Cell Count 6-8 Cells
LiPo/LiHV/LiFe/LiIon Cell Count 2-4 Cells
Pb Battery Voltage 6-12V
New Weight 315g
Dimensions 117 x 106 x 55mm

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Features
Optimized Operating Software:
The RDX1 Mini features the user-friendly AUTO function that sets the feeding
current during the process of charging or discharging. For lithium batteries
especially, it can prevent overcharging and any resulting consequences. With
the AUTO function, users can disconnect the circuit automatically and trigger
a single alarm to sound if any malfunction has been detected. All programs
unique to the RDX1 mini are controllable through a two-way linkage and
communication system intended to maximize safety and minimize the trouble.
Every setting is customizable according to user preference.
Battery Memory (Data Store/Load):
The RDX1 Mini is capable of storing up to 10 dierent charge/discharge proles
for your convenience. Users can keep the data pertaining to any program setting
for any battery to facilitate seamless charging or discharging. Saved proles can
be accessed and recalled as necessary.
Terminal Voltage Control(TVC):
For experienced users, the charger’s end voltage can be reset.
“Charge Master” PC Control Software:
Compatible with the with downloadable“Charge Master” software, the RDX1
Mini gives you unparalleled ability to operate the charger via your personal
computer. You can monitor pack voltage, cell voltage, and other data during
battery charging or view the charge data in real-time graphs. The“Charge
Master” gives you the option to initiate and update rmware as well.
Internal Independent Lithium Battery Balancer:
The RDX1 Mini employs an individual-cell-voltage balancer. It is not necessary to
connect an external balancer for balance charging.
Individual Cell Balancing While Discharging:
During the discharge process, the RDX1 Mini can monitor and balance each cell
of the battery individually. If the voltage of any single cell reads abnormally, an
error message will display and end the process automatically.
Adaptable to Various Types of Lithium Battery:
The RDX1 Mini is adaptable to various types of lithium batteries, including LiPo,
LiIon, LiFe and the new LiHV batteries.

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Fast and Storage Mode of Lithium Battery:
Depending on your application requirements, you may choose fast charge or
storage mode. Fast charge reduces the amount of time required for charging,
whereas ‘store’state controls the nal voltage of your battery.
Re-Peak Mode of NiMH/NiCd Battery:
In re-peak charge mode, the charger can peak charge the battery once, twice,
or three times in a row automatically. This function is useful for ensuring a full
battery charge.
Delta-Peak Sensitivity for NiMH/NiCd:
This automatic charge termination program is based on the principle of the
Delta-peak voltage detection. When the battery’s voltage exceeds the threshold,
the process will be terminated automatically.
Cyclic Charging/Discharging:
1 to 5 cyclic and continuous charge > discharge or discharge > charge sessions
are optimal for battery performance and balancing.
Automatic Charging Current Limit:
You can set the upper limit of the charging current when charging your NiMH
or NiCd battery. The ‘AUTO’charging mode, however, is recommended when
charging NiMH batteries with low impedance and capacity.
Battery Meter:
The user can check the battery’s total voltage, the highest voltage, the lowest
voltage and the voltage of each cell. The user can also check the battery’s total
internal resistance and the internal resistance of each cell.
Capacity Limit:
The charging capacity is always calculated as the charging current multiplied by
time. If the charging capacity exceeds the limit, the process will automatically
terminate according to the maximum value previously set.
Temperature Threshold*:
The battery’s internal chemical reaction will cause the temperature of the
battery to rise. If the temperature limit is reached, the process will be terminated.
* This function is available by connecting an optional temperature probe which
is available as a separate purchase.
Processing Time Limit:
Protect your battery by setting a maximum time limit for charging and discharging.
Features [cont.]

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Battery & Power Supply Connections
1.) Connecting to Power Source:
It is an AC charger only. Please insert the AC power cord to the wall socket (100-
240V) directly to power it on.
2.) Connecting the Battery:
Important!!! Before connecting a battery, it is absolutely essential to check one
last time that you have set the parameters correctly. If the settings are incorrect,
the battery may be damaged and could even burst into ames or explode. To
avoid short circuits between the banana plugs, always connect the charge leads
to the charger rst and only then to the battery. Reverse the sequence when
disconnecting the pack.
3.) Balance Socket:
The balance wire attached to the battery must be connected to the charger, with
the black wire aligned with the negative marking. Take care to maintain correct
polarity. (See wiring diagram below)
This diagram shows the correct way to connect your battery to the Hitec
RDX1 Mini when charging in the balance charge program mode.
WARNING:
Failure to connect as shown in this
diagram will damage your charger.
To avoid a short circuit between the
charge lead, always connect the
charge cable to the charger rst, then
connect the battery. Reverse the
sequence when disconnecting.

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BATT PROG / STOP Button:
Stop a function in-progress or to go back to previous step/screen.
DEC Button:
Scroll through menus or decrease the parameter value.
INC Button:
Scroll through the menus or increase the parameter value.
ENTER / START Button:
Enter parameters or store parameters on-screen. Start the charge/discharge
process.
When changing a parameter value in the program, press the START/ENTER
button to make it blink, then change the value by pressing the DEC and INC
button. The value will be stored by repressing the START/ENTER button. If there
is a second parameter to edit on the same screen, it will begin blinking after you
conrm the rst parameter value.
When you rst power the charger on it displays the last processes used. From
here you can change the battery type or press enter to change the charge/
discharge process, charge/discharge current rate and/or battery cell count. If
you are charging a battery identical to the last one used and want to perform
the same process then simply press the start to begin that process.
Input Functions
BATT. Type/Stop Button Start/Enter Button
Stop the progress
of the current
action or cycle back
to the previous
step / screen.
Scroll through
available menus
or increase
parameter values.
Scroll through
available menus
or decrease
parameter values.
Stop the progress of
the current action
or cycle back to the
previous step / screen.
INC. ButtonDEC. Button

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Program Flow Chart
For larger version visit www.hitecrcd.com

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Charger Operation
Note: You should set up the upper limit of the charge current to
avoid damage by excessive feeding current. Some batteries of low
resistance and capacity can lead to higher current.
lithium battery which
NiMH
NiCd
RE-PEAK
CYCLE
Pb
Batt
Type
Operation
Program Description
This charging mode is for charging LiPo/LiFe/LiIon/LiHV battery in normal mode.
This program is for charging or discharging
will not be used for long time.
The charging capacity may be less than normal charging but the
process time will be reduced.
This mode is for balancing the voltage of lithium-polymer battery
cells while charging.
The charger will charge NiMH and NiCd batteries using the
charge current set by the user.
In this program the charger detects the condition of the battery
which is connected to the output and automatically charges the
battery.
In re-peak charge mode, the charger can peak charge the
battery once, twice or three times in a row automatically. This is
good for confirming the battery is fully charged, and for checking
how well the battery receives fast charges.
1 to 5 cyclic and continuous process of charge>discharge or
discharge>charge is operable for battery refreshing and
balancing to stimulate the battery's activity.
LiPo
Lilon
LiFe
LiHV
CHARGE
DISCHARGE
STORAGE
FAST CHG
BAL CHARGE
CHARGE
AUTO CHG
DISCHARGE
CHARGE
DISCHARGE
This mode is for discharging LiPo/LiFe/LiIon/LiHV battery.
This mode is for discharging NiMH/NiCd battery.
This mode is for charging Pb battery.
This mode is for discharging Pb battery.
It is highly recommended to have the owchart handy while learning to operate
this charger. There are two main ways to setup the charger:
(1) Memory prole are available for setting and storing charge or discharge
parameters for up to 10 dierent batteries. Once a battery’s information is
stored into memory, it will be retained until changed again manually. Recalling a
battery’s memory number makes the charger instantly ready to go!
(2) The other method is by manually setting up the charge or discharge process
each time. The RDX1 Mini is capable of the following processes:

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Charger Operation [cont.]
The following steps describe how to manually setup the RDX1 Mini:
3. BATT/PROGRAM Select: Press INC and DEC to
scroll through all programs and press START/ENTER
to enter the LiPo BATT Program.
4. Mode Select: Press INC and DEC to scroll through
all modes and press START/ENTER to enter LiPo
Balance Charge Mode.
5. Battery Setting: Press START/ENTER. The current
value will start to blink, Press INC and DEC to
change the value and press START/ENTER to conrm
your setting.
At the same time, the battery cell’s number will start
to blink. Press INC and DEC to change the value and
press START/ENTER to conrm your setting.
6. Program Start: Press and hold START/ENTER for 3
seconds to start the program.
The charger is detecting the number of cells.
R shows the number of cells detected by the
charger and S is the number of cells set by the
user at the previous screen. If the numbers are not
identical, press STOP to go back to the previous
screen and recheck the number of cells in the
battery pack before proceeding.

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Charger Operation [cont.]
If both numbers are identical, press START/ENTER to begin
the charging process.
Information Displayed While Operating
Pressing INC or DEC during the charging or discharging process allows the user
to view a variety of information on the LCD screen.
Real-time status: battery type, battery cell, charge current,
battery voltage, elapsed time and charged capacity.
7. Charging Status Monitor: During the charge process, the
real-time status will be visible on the left side of the screen.
Voltage of each cell in the battery pack when the battery is
connected with balance lead.
Charged capacity percentage and average cell voltage of the
battery pack.
Cut o temperature.
Final voltage when the program ends.
Internal and External temperature.
(Temperature probe required to show external temperature.)
Capacity cut-o ON and the setting value of capacity.
Safety timer ON and duration of time in minutes.
8. Program Stop: During the charging process, press STOP
to stop the charging process.
9. Program Complete: When the charging process nishes, an audible sound will play.

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Memory Preset - Data Save/Load
Memory Preset - Data Save/Load:
The Save Data and Load Data programs make it easy to store and load charge and
discharge proles for up to 10 batteries per channel. Data can be saved for each
battery type and each charge mode available with the RDX1 mini. This allows you to
recall data for each battery when charging or discharging without having to set up
the program over again. You can also edit settings for each saved battery.
Save Data:
From the BATT/PROGRAM menu use the + or ▬buttons
to scroll to the BATT MEMORY program and press the
ENTER/Start ►button to enter the battery memory program. In the corner of
the screen you will see the number 1 ashing, use the + or ▬buttons to scroll
to scroll through the memories. When you are ready to select a memory to
program, press the ►button again to enter the memory setup menu.
Press the ►button again and the battery type will begin
to ash. Use the + or ▬buttons to select the battery type
(LiPo, LiFe, LiIon, LiHV, NiMH, NiCd or Pb, then press the ►button to conrm
your selection.
Now you will use + or ▬buttons to scroll through the battery parameters, using
the +you will make adjustments in the following order, using the ▬ button will
reverse this order.
Voltage and Number of Cells: Press the ►button and
the number of cells will begin to ash. Use the + or ▬
buttons to change the cell count then press the ►button to conrm your selection.
Charge Current: Press the ►button and the charge
current value will begin to ash. Use the +or ▬buttons
to change the charge current then press the ►button to conrm your selection.
Discharge Current: Press the ►button and the discharge
current value will begin to ash. Use the + or ▬buttons
to change the discharge current then press the ►button to conrm your
selection.
[BATT MEMORY 1]
ENTER SET ->
BATT TYPE
LiPo
BATT VOLTS
7.4V ( 2S )
CHARGE CURRENT
4.9A
DSCH CURRENT
2.0A

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Per Cell Discharge Voltage: Press the ►button and the
per cell discharge voltage value will begin to ash. Use
the + or ▬buttons to change the per cell discharge voltage, then press the ►
button to conrm your selection.
MAKE SURE TO FOLLOW YOUR BATTERY MANUFACTURERS
RECOMMENDATIONS REGARDING DISCHARGING. FAILURE TO DO SO
MAY DESTROY THE BATTERY OR RENDER IT UNSAFE FOR USE.
Terminal Voltage: Press the ►button and the terminal
voltage value will begin to ash. Use the + or ▬buttons
to change the terminal voltage, and then press the ►button to conrm your
selection.
CHANGING THE TERMINAL VOLTAGE IS ONLY INTENDED FOR EXPERT
USERS, ANY CHANGES TO DEFAULT SETTINGS ARE COMPLETELY ATYOUR
OWN RISK.
Save Program: Press the ►button to save the program.
SAVE….. will appear momentarily while the program is
written to the memory.
Once saved the screen indicate the memory number,
battery type, cell count, charge current and discharge
current.
Recall Memory:
From the BATT/PROGRAM menu use the + or ▬buttons to
scroll to the BATT MEMORY program and press ►button
to enter the battery memory program . Use the + or ▬buttons to scroll to scroll
through the memories. When you have found the memory you would like to use
press and the ►button again to recall the memory.
Use the + or ▬buttons to scroll the available proceses
(charge, discharge, balance charge etc.). Select the process
you would like to execute for the battery then press and hold the ►button for 3
seconds to begin the selected process.
Memory Preset - Data Save/Load [cont.]
DSCH VOLTAGE
3.0V/CELL
Warning
TVC = YOU R RISK
4.20V
Warning
SAVE PROGRAM
ENTER
SAVE PROGRAM
SAVE...
[ BATT MEMORY 1 ]
LiPo 7.4V (2S)
[ BATT MEMORY 1 ]
C:4.9 D:2.2 A
ENTER CHARGER
LOAD...
LiPo BALANCE CHG
4.9A 7.4V (2S)

20
Battery Meter
Press the START/ENTER button to access the Lithium Battery
Meter program.
Indicates each cell’s voltage.
Indicates the total voltage, the highest voltage and the
lowest voltage.
BATT/PROGRAM
BATT METER
4.20 4.19 4.19V
4.18 4.18 4.19V
MAIN 25.13V
H4.200 V L4.182V
The user can check the battery’s total voltage, the highest voltage, the
lowest voltage and each cell’s voltage. Connect the battery via the charger’s
main battery lead to battery socket and balance wires to the balance socket
as shown below.
The display indicates the current Main Voltage, Percentage of Charge,
Individual Cell Voltage, and the Highest and Lowest voltages of the
packs cells.