Smartech STC3.5 User manual

Issue 1, 01.01.23
1
SMART BATTERY CHARGER
MODELS: STC3.5

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INSTRUCTION MANUAL
Important Safety Instructions
Please read this manual thoroughly before use and store in a safe place for future reference. This
manual contains important safety ting instructions.
WARNING
•Before using the charger, please read the instructions carefully.
•Explosive gases may escape from the battery during charging. Prevent flames and sparks.
Provide adequate ventilation.
•For charging 6 Volt and 12 Volt lead acid and lithium LiFePO4 batteries only.
•Do not expose charger to rain or snow.
•Use of an attachment not recommended for the battery charger may result in a risk of fire,
electric shock, or injury to persons.
•Disconnect the 240V AC mains supply before making or breaking
•the connections to the battery
•The battery charger must be plugged into an earthed socket-outlet.
•Connection to supply mains is to be in accordance with National wiring rules.
•Do not operate charger with damaged cord or plug. It must be replaced or repaired by a
qualified person.
•Do not attempt to charge non-rechargeable batteries.
•Never charge a frozen battery
•Ensure all vehicle accessories including lights, heaters, appliances, etc are turned off prior to
charging.
•The charger may not be used as a starting aid.
•This appliance is not intended for use by young children or infirm persons unless they have
been adequately supervised by a responsible person to ensure that they can use the
appliance safely.
•Please store disconnected and out of reach of unsupervised children.

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CONTENTS
1. STC3.5 Smart charger x 1
2. Clamp cable x 1
3. Ring terminal harness x 1
4. Fuse x 1
5. User Manual x 1

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FEATURES
8-STAGE SMART CHARGING
This is a fully automatic battery charger with 8 charge stages.
All Smartech chargers are equipped with a sophisticated micro processing controller that ensures optimal charge is
delivered to the battery whilst protecting the battery from being overcharged.
8-stage charging is an accurate and comprehensive charging process that will result in better battery performance and
longer life expectancy when compared to traditional chargers.
Smartech 8-stage smart chargers are suitable for many 6V and 12V battery types including LiFePO4 batteries,
Absorbent Glass Mat (AGM) batteries, Colloidal Sealed Lead-Acid (GEL) batteries, Motorcycle, Maintenance Free and
Calcium batteries.
The 8 charge stages are:
Diagnosis, Pulse, Soft Start, Bulk Charge, Absorption, Analysis, Equalization and Float.
STAGE 1 –DIAGNOSIS
The Micro Controller Unit (MCU) will analyse the condition of the battery to provide correct charge or prevent the charging
of a defective battery.
STAGE 2 –PULSE
If necessary, a Pulse charge is applied to aid in reducing the build up of sulphate crystals on the plates of a discharged
lead acid battery. This method is also known as Desulphation. This stage does not apply to Lithium Mode.
STAGE 3 –SOFT START
Start the charging process with a gentle (soft) charge.
STAGE 4 –BULK CHARGE
Constant Current charging until desired voltage is reached.
STAGE 5 –ABSORPTION
Constant Voltage charging. Current will diminish as the MCU maintains a constant voltage until fully charged.
STAGE 6 –ANALYSIS
Charger output will stop, and the charger will analyse the battery to ensure it holds its charge.
STAGE 7 –EQUALIZATION
After analyzing the battery, the charger may start to charge the battery at a higher voltage in order to balance the voltage
of each cell. This stage does not apply to Lithium Mode.
STAGE 8 –FLOAT
The MCU will continue to monitor the voltage and apply a maintenance charge as required.

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SWITCHMODE TECHNOLOGY
Using the latest technology in battery chargers, switchmode chargers convert 240V AC power to 12V DC power using
electronic components unlike traditional battery chargers that rely on heavy transformers. This allows the charger to be
lightweight and compact without sacrificing on performance.
SPARKPROOF & POLARITY PROTECTION
Prevents the output leads from sparking due to accidental reverse connection or short circuit, making the charger safer
to use around batteries.
SHORT CIRCUIT PROTECTION
The charger provides protection against excessive currents, short circuits and overloads. If such a fault is detected
during charging, the charger will automatically terminate the charging program.
OVER VOLTAGE PROTECTION
The charger will provide protection against voltages that exceed the acceptable voltage rating. If such a fault is detected
during charging, the charger will automatically terminate the charging program.
OVER TEMPERATURE PROTECTION
If the charger’s internal temperature limit is exceeded, the over temperature protection will be triggered to protect the
unit against overheating.
ADJUSTABLE CHARGE VOLTAGE
The charger’s voltage can be selected to suit 6V or 12V batteries.
AUTOMATIC BMS ACTIVATION
Will automatically re-activate a LiFePO4 Battery Management System that has shut down to protect the battery.
LED CHARGE INDICATOR
LED lights will show the charge status (25%, 50%, 75%, 100%) and can indicate a battery fault.
CHARGE MODES
MODE
EXPLANATION
STANDBY
The charger stays in Standby mode automatically when the charger is connected to AC power.
In standby mode, the charger does not charge or supply power to the battery. In this mode,
power from the AC socket is on standby until a mode is selected.
12V NORM 3.5A
For charging 12 Volt Wet, Gel, Enhanced Flooded, Maintenance-free and Calcium batteries at
a rate of 3.5 Amps. The white LED will light up when this mode is selected.
12V COLD/AGM
3.5A
For charging 12 Volt AGM batteries at a rate of 3.5 Amps. The white LED will light up when this
mode is selected.
12V NORM 2A
For charging 12 Volt Wet, Gel, Enhanced Flooded, Maintenance-free and Calcium batteries at
a rate of 2 Amps. The white LED will light up when this mode is selected.
12V COLD/AGM
2A
For charging 12 Volt AGM batteries at a rate of 2 Amps. The white LED will light up when this
mode is selected.
12V LITHIUM
For charging 12 Volt Lithium batteries at a rate of 3.5 Amps. The white LED will light up when
this mode is selected.
6V NORM
For charging 6 Volt Wet, Gel, Enhanced Flooded, Maintenance-free and Calcium batteries at a
rate of 3.5 Amps. The white LED will light up when this mode is selected.
REPAIR
For charging batteries that have been stored for a long time without charging. 2 Amp rate.

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BATTERY TYPE OUTPUT VOLTAGE
Battery Type
6V
6V Float Voltage
12V
12V Float Voltage
Standard Battery
7.2±0.2V
6.8±0.2V
14.4±0.2V
13.6±0.2V
AGM
7.4±0.2V
6.8±0.2V
14.8±0.2V
13.6±0.2V
LifePO4
7.4±0.2V
7.1±0.2V
14.6±0.2V
13.6±0.2V
CHARGING INSTRUCTIONS
STEP 1 –CHARGE PREPARATION AND SAFETY PRECAUTIONS
Read this manual thoroughly, follow instructions and adhere to safety precautions. Ensure the charger is in a safe
location away from the battery. Do not operate charger in a closed-in area or restrict ventilation in any way.
Study the battery manufacturer's specific precautions, recommended rates of charge and determine the correct voltage
of the battery.
STEP 2 –CONNECT TO 240V MAINS POWER
Connect the battery charger to the 240V mains powered socket and turn on the mains power. The plug must be plugged
into an outlet that is properly installed in accordance with all local codes and ordinances and never alter AC cord or plug
provided. The charger will start in standby mode with a green LED indication.
STEP 3A –CONNECT TO BATTERY OUT OF VEHICLE
Connect the RED output lead (battery clip) from the charger to the Positive (+) battery terminal and ensure a good
connection is made.
Connect the BLACK output lead (battery clip) from the charger to the Negative (-) battery terminal and ensure a good
connection is made.
STEP 3B –CONNECT TO BATTERY IN VEHICLE
Before connecting, determine if the vehicle is Negatively (-) or Positively (+) earthed. Negative earthed vehicles are most
common and use the chassis as an earth by connecting the battery negative terminal to a conductive chassis point.
If you are unsure, please seek advice from a qualified person before connecting.
Negatively Earthed
Connect the RED lead (battery clip) from the charger to the Positive (+) battery terminal. Connect the BLACK
lead (battery clip) from the charger to the vehicle’s chassis away from the fuel line or moving parts. Always
ensure a good connection is made.
Positively Earthed
Connect the BLACK lead (battery clip) from the charger to the Negative (-) battery terminal.
Connect the RED lead (battery clip) from the charger to the vehicle’s chassis away from the fuel line or moving
parts. Always ensure a good connection is made.
STEP 4 –SET MODE
The mode should be set according to the type and voltage of the battery. To set, press the MODE button repeatedly
until desired mode is displayed.
To use 6V NORM mode you will need to press and hold the MODE button until the 6V NORM mode LED lights up.
To use LITHIUM mode you will need to press and hold the MODE button again until the LITHIUM LED lights up.
To use REPAIR mode you will need to press and hold the MODE button again until the REPAIR LED lights up.
STEP 5 –CHARGING
During the charging process, the LED will show the mode selected and the state of charge. LEDs will slowly flash on
the current charge percentage to indicate charging is still in process. When the charging process is complete all white
percentage LEDs will remain on. IN this state the charger will remain in float mode until the battery clamps are
disconnected. When the clamps are disconnected it will return to Standby mode. If there is an error in charging, then
the fault LED will light up.
STEP 6 –DISCONNECTION
Ensure the 240V mains switch is turned off and the charger is disconnected from the 240V mains power before
disconnecting clamps from the battery.

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FAULTS & ERRORS
The Smartech chargers sophisticated smart MCU will determine multiple issues with the charging process or the battery.
If a fault is recognized the charger will display a series of blink sequences that help you identify the cause of the error
and potential solutions. All Error Conditions are displayed with the Error LED and Standby LED flashing back and forth.
The number of flashes between each pulse denotes a potential Error Condition. See the table below for more
information.
RED FAULT
LED
CAUSE
REMEDY
One constant
Flash
Reverse connection or bad
connection of the clips
Check the clips are connected to the correct polarity and have a good clean
contact to the terminal. It may be necessary to clean the battery terminals
to ensure good contact. Make sure the clips are not touching each other.
Double
constant flash
AC output short circuit
Disconnect the charger and check your AC plug for damage. Fix if
necessary/possible.
Triple constant
flash
Over Temperature protection
Stop charging and check and fix connection. Allow charger to cool down
before resuming charge process.
Solid red LED
Faulty Battery or incorrect battery
Battery is faulty and may need to be replaced. Have the battery tested by
a qualified person. Or check you have selected the correct mode for the
battery you intend to charge.
TECHNICAL SPECIFICATIONS
Model:
STC3.5
Charger Type:
8 stage Automatic charger
Input:
220~240V AC 50Hz –60Hz
Power:
70W max
Output:
6 Vdc, 3500mA
12 Vdc, 3500mA
12 Vdc, 2000mA
Minimum Start Voltage:
2.0V
Float Current:
300mA ±200mA
Functions:
Float charging, reverse polarity protection, short circuit protection, Over
voltage protection, overheating protection, LiFePO4 BMS Reactivation.
Ambient Temperature:
0°C to 40°C
Thermal Protection:
95°C
Cooling:
Natural Cooling
Types of Batteries:
LiFePO4, AGM, GEL, Maintenance Free Lead Acid, Calcium Lead Acid
Cable Lengths:
AC cable: 1.4m
Output cable: 1.8m
Dimensions:
153 x 72 x 43mm
Weight:
0.35Kg
Fuse Rating:
T3.15A 250V
Protection:
IP60
Protection Class:
Certifications:

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WARRANTY STATEMENT
APPLICABLE ONLY TO PRODUCTS SOLD IN AUSTRALIA
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a
replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You
are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does
not amount to a major failure.
All claims are subject to Super Start Batteries Pty Ltd standard testing procedures by its authorized representatives.
Should a product be deemed defective due to a manufacturing fault and is within its applicable warranty period; it will
be replaced with an equivalent product free of charge.
The product is guaranteed to be free from defects in workmanship and parts for a period of 12 months from the date of
purchase. This warranty does not cover ordinary wear and tear, abuse, alteration of products, damage caused by the
consumer, changes in the condition or operational qualities of the product resulting from incorrect storage, or other
influences. Warranty does not include transit costs if the product is sent back for a claim.
Proof of purchase is required to make a claim. The warranty period is not renewed or extended as a result of a repair or
replacement. The warranty is not transferable and is only offered to the original end user of the product.
If you believe your product to be defective due to a manufacturing fault you must deliver the product at your cost to the
original place of purchase. Alternately, you may contact Super Start Batteries Pty Ltd directly to arrange for it to be
returned to our head office or a nominated distributor for assessment. If the product is confirmed as defective we will
repair or replace it under the terms of the relevant warranty. If a product is deemed by our testing not to be faulty, you
have the choice to have the product returned at your cost. You must also deliver the original invoice evidencing the date
and place of purchase together with an explanation in writing as to the nature of the claim.

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Distributed By
Super Start Batteries Pty L:td
Head Office:
Unit 30, 76 Hume Highway
Lansvale, NSW 2166
Telephone: [phone]
Facsimile: [phone]
Website: www.superstart.com.au/