Tenergy TN455 User manual

Intelligent NiMH/NiCd Battery Charger
TN455
USER’S MANUAL
www.Tenergy.com

CONTENTS
1. Intended Use ........................................................................................................... 3
2. Packaged Contents................................................................................................. 4
3. Safety Instructions ................................................................................................. 4
3.1Product Safety ................................................................................................... 4
3.2 Battery safety.................................................................................................... 4
4. Operating Elements................................................................................................ 5
5. Power Supply.......................................................................................................... 5
6. Operation................................................................................................................. 5
6.1 Mode Selection ................................................................................................. 5
6.2 Current selection .............................................................................................. 6
7. Overheat protection.................................................................................................. 6
8. Operation Modes and Display.................................................................................. 6
8.1 Operation Mode ................................................................................................ 6
8.2 Display............................................................................................................... 9
9. Maintenance. ............................................................................................................. 10
10. Disposal................................................................................................................... 10

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Tenergy 4-Bay NiMH/NiCd Intelligent Charger with Backlit LCD, TN455
Tenergy's TN455 is an intelligent charger designed for AA and AAA NiMH/NiCd batteries.
TN455 offers multiple operation modes based on your needs (charge, test, refresh,
discharge/charge). Its backlit LCD allows you to see the charging status in real time,
including the charging current, battery voltage, measured capacity, as well as the elapsed
time.
Parameter
Value
Input Voltage DC 12V /1.5A
Power Consumption 12W-max
Supported Battery Types NiMH, NiCd; AA & AAA size
Number of Charging Slots 4 (independent channels)
Charge current
200mA, 500mA, 700mA, 1000mA
Discharge current
100 mA, 250 mA, 350 mA, 500mA
Charging Method -dV
Protection against battery overheating Yes
Protection against memory effect (NiCd)
Yes
Device operation modes
Charging; discharging; refresh; testing
Backlit LCD Yes
USB output Yes
Please carefully read the following instructions before use.
OPERATING INSTRUCTIONS
1 Intended Use
The product is designed for use with NiMH or NiCd rechargeable batteries. It provides
four independent charging slots for AA / AAA size batteries. This charger can also
optimize and test the maximum capacity of your rechargeable batteries. Each charging
slot has its own display to show various information, such as charging current, battery
voltage, charged capacity, and elapsed time.
The charging current can be selected from 200 mA, 500 mA, 700 mA and 1000 mA.
Batteries of different types (NiMH/NiCd) and sizes (AA/AAA) with different capacities
can be charged at the same time. This charger uses the minus delta voltage (-ΔV)
function to determine the charging status. When a battery is fully charged, the charger will
switch to trickle charging automatically. Therefore the battery will be kept at its optimum
capacity. The charger also has built-in overheat detection to protect rechargeable
batteries and charger itself from getting too hot during use. The charger can only be used
with the original power supply included with this charger.
Please operate and store this charger in dry, indoor environment only. This product

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fulfills European and national requirements related to electromagnetic compatibility
(EMC). CE conformity has been verified, and manufacturer's compliance statement is
available upon request. Unauthorized conversion and/or modification of device prohibited
and will void the warranty. Any usage other than described above is not permitted and
can damage the product, leading to associated risks such as short-circuit, fire, electric
shock, etc. Please read the operating instructions thoroughly and keep them for future
reference.
2 Package Contents
Tenergy TN455 Charger x 1
Power Adapter x 1
User Manual x 1
3 Safety Instructions
We do not assume liability for resulting damages to property or personal injury if the
product has been abused in any way or damaged by improper use or failure to observe
these operating instructions .
3.1 Product Safety
This product must not be exposed to substantial mechanical strain or strong vibrations.
This product must be protected against electromagnetic files, static electrical fields,
extreme temperatures, direct sunlight and moisture.
The manufacturer’s instructions for the batteries must be observed, before they are used
with this charger.
This product should not be connected immediately after it has been brought from an area
of cold temperature to an area of warm temperature, as condensed water may damage
the product. Wait until the product adapts to the new ambient temperature before use.
Sufficient ventilation is essential when operating the charger. Never cover the charger
during use. Please note that when ambient temperature is over 35 degrees Celsius, the
device's overheat protection may be triggered easily, and thus longer charging time will
be needed.
3.2 Battery safety
Correct polarity must be observed while inserting the batteries.
Non-rechargeable batteries, rechargeable alkaline batteries (RAM), lead acid batteries
and lithium batteries must not be charged with this product.
Batteries should be removed from the device if it is not used for a long period of time to
prevent damage through battery leaking. Leaking or damaged batteries might cause
acid burns when they come contact with the skin, therefore please use suitable protective
gloves to handle damaged batteries.

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Batteries must not be dismantled, short-circuited or thrown into fire. Never recharge
non-rechargeable batteries as it may lead to explosion.
If you have any queries about the device that are not answered user manual, please
check with the distributor or manufacturer for further help.
4. Operating Elements
MODE Select Button:Lets you select the operation mode
(Dharge, Discharge, Refresh, Test) when batteries are first
inserted, or reset the mode selection (hold and press for
more than 1 sec) when the charger is in operation.
CURRENT Button: Lets you select the charging current
when batteries are first inserted, or cycle through the status
display options once the charger is in operation.
5. Power Supply
Only the power adapter included with the
charger is allowed to be used. When the
charger is powered up, all LCD segments
will light up momentarily. The “null” icon will be shown in the LCD
display for each slot, until a battery has been detected. When the
charger is powered up, its USB output can be used to charge your
portable devices regardless whether there are batteries in the charger.
6. Operation
Once a rechargeable battery is inserted, its present
voltage (for example,”1.2v”) will be displayed for 4
seconds, then “200mA Charge” will be shown on
display for another 4 seconds as the default charging
current/operation. If the MODE or CURRENT button
is not pressed during these 8 seconds, the charging
process will start.
To change the charging current and/or operation mode, press and
hold the Mode Select button for 1 second. After which the next
available operation mode will be shown, and you can continue to
press MODE to select other functions, or press CURRENT to change
the charge/discharge current.
If batteries that are damaged or defective are inserted into the charger,
the “null” icon will be displayed on the display and the charger will
refuse to charge them.
6.1 Mode Selection
Press and hold MODE for 1 second to change the operating mode for all charging slots.
Press the ：MODEbutton subsequently to toggle among the “Charge”,

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“Discharge”, “Test” and “Refresh” operation modes.
After selecting the mode you can change the charging/discharging current pressing
CURRENT.
6.2 Current selection
Within the first 8 seconds after inserting the batteries, press the CURRENT button to
select desired charge current (200, 500, 700, 1000mA) or discharge current (100, 250,
350, 500). If no button is pressed for 4 seconds, the chosen operation mode will begin.
After that, the charging current and / or operation mode can be changed by pressing and
holding MODE for 1 second.
7. Overheat protection
Overheating can be detected by the charger, when either battery
temperature is above 55°C / 131°F, or the charger's internal
temperature is above 70°C / 158°F. When that happens, the current
charging or discharging process will be paused immediately, and the
charging or discharging current display will show “000mA”. The
charger will only resume its operation once the temperature of the
rechargeable batteries drops below 40°C / 104°F and charger
controller board drops below 50°C / 122°F. This feature is extremely
important in protecting the batteries or charger itself from over-
heating.
8. Operation Modes and Display
8.1 Operation Mode
Charge Mode: In Change Mode, your battery is charged up to its maximum capacity.
Stage1 Charge
Stage 2 Charge over, trickle charge begins.

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Discharge Mode: The Discharge Mode is used to reduce the memory effect. The
rechargeable battery is discharged to a preset battery voltage (0.9V). Once a battery
has been discharged, it will be charged at the pre-selected charging current.
Discharging current is always half of the charging current.
Stage 1 Discharge
Stage2 Charge.
Stage3 Charge over, trickle charge.
Refresh Mode: With the Refresh Mode, the battery is charged and discharged
repeatedly to optimize to its maximum capacity. Old rechargeable batteries that have
not been used for a long period of time can be restored to their rated capacity. Depends
on the selected charge current, it can take hours or even days before completion.

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Stage 1 Discharge.
Stage 2 Charge
Stage 3 The refresh process is over, trickle charge begins
Test Mode: In Test Mode, the charger can measure a battery's capacity. The
maximum capacity is determined by discharging the rechargeable battery after it has
been fully charged. If the maximum capacity is much lower than the rated capacity,
then it may have reached the end of its cycle life.
Stage 1 Charge.

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Stage 2 Discharge.
Stage 3 Discharge over, the second charge current selected.
Stage 4 The testing process is over, trickle charge begins.

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8.2 Display
Charge/Discharge current: Shows the present charge/discharge current setting.
Elapsed Time*: The charging/discharging time of the last cycle is displayed.
Accumulated capacity: The accumulated battery capacity is displayed in mAh.
Charge voltage: The instantaneous battery voltage is displayed.
Full: After a battery has been fully charged, the status icon would read "Full",
and the charger will switch to trickle charging. Trickle charging is a very small
charging current that compensates for self-discharging of your fully charged
batteries, without the risk of overheating or overcharging.
*Once the the elapsed time has reached 19 hours and 59 minutes, the timer will reset
and begin counting from 0:00 again.
9. Maintenance.
The device is maintenance-free but should be cleaned occasionally. When cleaning, the
device must be removed from any power source. Only use dry and soft cloth to clear
housing of the charger. Do not use abrasive or solvents.
10. Dispose of electrical and electronic waste properly in order to preserve, protect
and improve the quality of environment, and protect human. Please return unserviceable
product to relevant facilities in accordance with statutory regulations.
Warning
This battery charger can only charge NiMH/NiCd batteries.
Please read the specifications carefully before use, and pay close attention to
the recommended charging current. Do not select charging current higher
than the recommended settings.
Please don`t use this charger with other power adapters.
The charger's temperature may increase significantly during operation.
Please use it in a well-ventilated area.
Please unplug the power supply and remove your batteries from the charger's
charging slots when the charger is not in use.
The battery data displayed by this product is just for your reference only, and
may differ from those measured with a professional equipment.