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Highlights key aspects of the M4 Pocket charger, including tips and important information.
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Set the battery type and its corresponding cut-off voltage for safe and effective charging.
Select the appropriate charging current from 1.0A, 2.0A, 3.0A, or 5.0A.
The M4 Pocket is an ultra-compact balance charger designed for managing and charging various types of lithium batteries. Despite its small size, it offers a maximum output of 80W, making it a capable and portable charging solution. The device features an intuitive user interface displayed on a color IPS full viewing angle display, ensuring ease of use and clear visibility of charging parameters.
The primary function of the M4 Pocket is to charge and balance LiPo, LiHV, LiFe, and Li-ion 1-4S batteries. It supports a DC input voltage range of 7.0-25.0V, allowing for flexible power source options. The charging current is adjustable, with a maximum output of 5.0A at 80W. A key feature is the user-defined Lithium battery cut-off voltage (TVC function), which allows users to customize the charging termination voltage based on their specific battery requirements. This functionality is crucial for optimizing battery life and ensuring safety. The device also incorporates a balance management system with a balance current of 400mA, which helps to equalize the voltage across individual cells in a multi-cell battery pack, thereby improving overall battery health and performance.
To begin using the M4 Pocket, users must first connect it to a suitable DC power outlet within the 7.0-25.0V range. Upon booting, the device displays a boot logo for two seconds before entering the main interface. A safety feature requires users to short press the [Voltage/Current] key to unlock the system and enable parameter adjustments, preventing accidental changes to settings.
The main interface provides a comprehensive overview of the charging process, including charging time, input voltage, charger temperature, selected cell type cutoff voltage, current battery voltage, and current charging current. It also indicates the status of individual cells, showing their voltage and whether they are balancing.
Setting up a charge involves a few simple steps. Users can long press the [Voltage/Current] key to select the battery cut-off voltage, which corresponds to the battery type (e.g., 4.20V for LiPo, 4.35V for LiHV, 3.85V for LiPo-Storage, and 3.60V for LiFe). It is critical to select the correct battery type to avoid damaging the battery or creating a fire hazard. The device is not designed to charge non-compatible battery chemistries.
Once the battery type is selected, a short press of the [Voltage/Current] key allows users to choose the charging current from available options (1.0A, 2.0A, 3.0A, 5.0A). For optimal battery cycle life, it is recommended to use a charging rate of 1C-2C. For example, a 1000mAh battery would typically be charged at 1.0A-2.0A. Users should always consult their battery manufacturer's guidelines for specific charging instructions.
The M4 Pocket automatically initiates charging once the output main port and the balance port voltage match the connected battery. During charging, the display provides real-time updates on the accumulated capacity charged (888mAh), as well as the voltage of each individual cell and its balancing status. For 1S batteries, both the main port and the balance port must be connected for the charger to recognize and begin charging.
The M4 Pocket includes features that contribute to its longevity and user convenience. Heat dissipation vents are integrated into the design to manage internal temperatures during operation, ensuring stable performance and preventing overheating.
For maintaining accuracy, the device offers a manual calibration mode. Before connecting to the power supply, users can press and hold the [Voltage/Current] key to enter this mode. Here, they can adjust the terminal voltage, which is the voltage after the battery is fully charged, with an accuracy of +/- 10mV. More importantly, the calibration voltage feature allows users to correct any inaccuracies in cell voltage readings. If the displayed cell voltages appear incorrect, users can measure the actual voltage with a high-quality voltage meter and then set this value in the charger to match the meter's reading. This ensures precise voltage monitoring and charging.
Additionally, the device includes a "DEFAULT" option within the calibration mode, allowing users to restore the charger to its factory default settings if needed. This can be useful for troubleshooting or resetting any customized calibration values.
The M4 Pocket is designed for supervised use, and users are advised never to leave charging batteries unattended. When not in use, the input power should be unplugged. The device should also not be operated in hot, humid, flammable, or explosive environments to ensure safety.
| Display | LCD |
|---|---|
| Weight | 50g |
| Balance Current | 300mA |
| Battery Types Supported | LiPo, LiFe, NiMH, NiCd, Pb |
| Battery Type | LiPo |
| USB Power | 5V/2A |
| Cell Count | 1-4 cells |