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M4 Pocket
Manual V1.0
2021.11
www.toolkitrc.com
ToolkitRC Technology (Shenzhen) Co.. Ltd
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Introduction
Tips
Important
Information
Thank you for purchasing the M4 Pocket balance
charger, please read this manual carefully before use.
Key Points
Further information
To ensure you have the best experience with this
product, please scan the QR code below to stay up to
date with news, information and firmware updates for
your charger; this information could be found at
www.toolkitrc.com/M4Pocket
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Safety
1. M4 Pocket allows input voltage of DC
7.0-25.0V. Ensure the charger is only connected to a
suitable AC power outlet.
2. Do not use this product in hot, humid, flammable or
explosive environments.
3. Please do not use this charger without supervision.
Never leave charging batteries unattended.
4. When not using this product, please unplug the input
power.
5. When using the charging function, please set a
current that matches the battery. Do not set an excessive
current for charging to avoid damage to the battery.
Check the guidelines of your battery’s manufacturer for
correct charging instructions.
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Contents
Introduction
Key Points
Further information
Safety
Contents
M4AC Layout
Quick start
Charge settings
1，Battery type setting
2，Current setting
Start charging
Terminal voltage setting and manual
calibration
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DEFAULT.
Specification
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Product description
The M4 Pocket is a ultra-compact balance charger;
despite the small size, the M4 pocket has a maximum
output of 80W! Featuring an intuitive user interface and
a color IPS full viewing angle display, the M4 Pocket is a
capable, bring-anywhere charger!
Charge and balance management of LiPo, LiHV,
LiFe & Lion 1-4S batteries.
Voltage input DC 7.0-25.0V.
Charging current: Maximum 5.0A @MAX 80W.
User-defined Lithium battery cut-off voltage (TVC
function).
Battery voltage can be manually calibrated.
Charging accuracy: <0.005V.
Balance current: 400mA.
1.54 inch, IPS full viewing angle display.
High resolution 240*240 pixels.
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M4 Pocket Layout
Display screen
Voltage/Current key
XT60/XT30 Output ports
Balance port
Input port XT60/USB-C
Heat dissipation vents
Front
Back
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Quick start
1，Connect the M4 Pocket to a suitable DC 7.0-25.0V to
power outlet.
2，The display shows the boot logo for 2 seconds.
3，After booting up, the screen enters the main
interface as shown below:
4，Short press [Voltage/Current] key to unlock the
system and start adjusting parameters.
5，Long press [Voltage/Current] key to set the charging
cut-off voltage.
6，Short press [Voltage/Current] key to select the
charging current.
7，When the output main port and the balance port
voltage match, the M4 pocket will automatically start
charging.
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=================================
Tips:
Every time you turn on the charger, you need to
press the button once to unlock the system. This is a
safety feature designed to prevent incorrect selection of
battery type and current.
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Charging settings
After the power is turned on and the charger unlocked,
the screen will display the following.
1，Battery type setting
Long press [Voltage/Current] key to select battery
cut-off voltage (battery type), displayed as follows.
Different battery chemistries have different cutoff
voltages. Please refer to the following table as reference,
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and verify with your battery manual:
4.20V
Lipo
4.35V
LiHv
3.85V
Lipo-Storage
3.60V
LiFe
Important:
1, Ensure the correct battery type has been
Nomenclature:
1, Lipo: Often referred to as a lithium polymer
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selected prior to charging. An incorrect choice may
damage the battery and/or become a fire hazard.
Please use caution.
2, Do not use this product to charge non-compatible
battery chemistries.
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battery, a battery with a nominal voltage of 3.70V and
4.20V when fully charged.
2, LiHV: Often referred to as a high-voltage lithium
battery, a battery with a nominal voltage of 3.85V and
4.35V when fully charged.
3, LiFe: Often referred to as an iron-lithium battery, a
battery with a nominal voltage of 3.30V and 3.60V when
fully charged.
4, Lion: Often called a lithium-ion battery, a battery with
a nominal voltage of 3.60V and 4.10V when fully
charged.
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2，Current setting
Tips:
When selecting the current, it is
Short press [Voltage/Current] key to select the
charging current, the current can be selected from 4
values, 1.0A, 2.0A, 3.0A, 5.0A. The display is as follows.
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recommended to use a charging rate of 1C-2C. For
example: 1000mAh battery, use 1.0A-2.0A for charging;
This effectively improves the cycle life of the battery.
Always check the battery manufacturers guidelines and
charging instructions before charging.
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Start charging
After setting the battery voltage and current,
connect the battery. After the charger detects that the
voltage between the main port and the balance port
matches, it will automatically start charging.
Display as follows:
Display content description:
000:18：Charging time.
20.5V：Input voltage.
35℃：Charger temperature.
4.20v：The selected cell type cutoff voltage
4.35v 3.85v 3.60v ： Other cell cutoff voltages (not
selected).
16.0V：Current battery voltage.
5.00A：Current charging current.
C:Current limit sign. P:Power current limit,
T:temperature limit, F:The battery or one of the cells is
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full.
Tips:
When charging a 1S battery, the battery voltage
888mAh：Accumulated capacity that has been charged.
1 4.000V: The first cell voltage, this cell is not balancing
2 4.001V: The second cell voltage, this cell is slowly
balancing
3 4.002V: The third cell voltage, this cell is slowly
balancing
4 4.005V: The fourth cell voltage, this cell is quickly
balancing
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needs to be provided to the balance port at the same
time, so that the charger can recognize and start
charging.
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Terminal voltage setting and
manual calibration
Before connecting to the power supply, press and
hold [Voltage/Current] key to enter the calibration mode,
as shown below:
Terminal volte: The terminal voltage after the battery is
fully charged. Accurate to +/- 10mV.
Calibration voltage: Battery calibration voltage, if the cell
voltage readings appear to be incorrect, use a
high-quality voltage meter to measure the actual
voltage, then set this value to be the same as the meter.
DEFAULT: Restore to factory default.
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Specification
Charge
Input
XT60 7.0-25.0V MAX 5A
USB-C 5.0-20.0V@QC,PD,AFC,FCP
Battery
type
LiPo LiHv LiFe LipoStorage
1-4S
Charging
power
1.0-5.0A @ 80W
Balance
current
MAX 400mA @4.20V
Charging
accuracy
<0.005V @4.20V
USB-C
Output
Display
LCD
IPS 1.54” 240*240 Pixels
Product
Size
80*40*30mm
Weight
75g
Individu
al
packing
Size
82*42*32 mm
Weight
85g
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