IP2326 2/3 Series Li‑ion Battery Boost Fast Charging Module QC2.0/3.0 15W Synchronous Rectification 2S/3S Selectable with Balancing Drone Battery Charger

IP2326 2/3 Series Li‑ion Battery Boost Fast Charging Module Product Overview

The IP2326 2/3 series Li‑ion battery boost fast charging module is a high‑efficiency synchronous rectification boost charger based on the IP2326 chip, designed for 2‑series or 3‑series 3.7V Li‑ion battery packs. It supports QC2.0/QC3.0 fast charge protocols, with input via Type‑C or solder pads, delivering up to 15W charging power and 94% boost charging efficiency. Users can select 2S (8.4V) or 3S (12.6V) charging mode via solder jumpers, with battery balancing support in 2S mode. Charging current and constant voltage are adjustable via resistors. Ideal for drones, RC models, smart home devices, and portable equipment with 2S/3S Li‑ion batteries.

IP2326 2/3 Series Li‑ion Battery Boost Fast Charging Module Core Features

QC2.0/QC3.0 Fast Charge Input Support： When a QC fast charger is connected via Type‑C, the module automatically adjusts the charging voltage for optimal efficiency. Solder pad input is also supported (input voltage must be lower than battery voltage; the module operates in boost mode only).

2S/3S Li‑ion Battery Charging Selectable： Default 2S (8.4V) charging. Remove the resistor and short the ROV point to switch to 3S (12.6V) charging. 2S mode includes battery balancing to extend battery pack life.

15W Synchronous Boost Charging： Built‑in synchronous rectification boost architecture delivers up to 94% charging efficiency with low heat generation.

Adjustable Charging Current： Set via RISET resistor using the formula ICHG = 90000 / RISET. Default configuration uses 100K (0.9A) + 180K (0.5A) in parallel for 1.4A total. Resistors can be changed or removed to adjust current.

Adjustable Constant Voltage： Set via RVSET resistor. Default per‑cell voltage is 4.2V, corresponding to 8.4V for 2S and 12.6V for 3S.

Multiple Protection Features： Input OVP/UVP, output OCP/OVP/short‑circuit protection, and programmable charge timeout protection.

Charging Status Indication： Red LED (power), blue LED (charging on, off when full, flashing on fault).

NTC Temperature Monitoring Extension： Reserved NTC pads for external 100K thermistor (B=4100) to enable battery temperature protection.

IP2326 2/3 Series Li‑ion Battery Boost Fast Charging Module Applications

Drone / RC Battery Charging： Fast, balanced charging for 2S/3S Li‑ion packs used in racing drones, aerial photography platforms, and RC models.

Smart Home / Portable Devices： Charging for robot vacuums, smart speakers, portable fans, and other 2S/3S battery‑powered devices.

DIY Battery Pack Charging： Professional charging for custom 2S/3S Li‑ion battery packs.

Industrial Handheld Devices： Battery charging for handheld terminals, inspection instruments, and similar equipment.

IP2326 2/3 Series Li‑ion Battery Boost Fast Charging Module Key Advantages

The IP2326 module delivers efficient QC‑fast‑charge‑to‑2S/3S Li‑ion battery charging with minimal external components and low cost. The synchronous rectification boost architecture achieves 94% efficiency, significantly reducing heat compared to traditional diode‑rectified solutions. Built‑in cell balancing in 2S mode extends battery pack life by equalising cell voltages. Both charging current and constant voltage are resistor‑adjustable to suit different battery capacities and chemistries. The Type‑C port supports QC fast charge protocols for rapid charging with compatible chargers, while solder pad input accommodates non‑QC power sources. Comprehensive protection features ensure safe and reliable charging. Whether for drone enthusiasts, DIY makers, or product developers, the IP2326 module offers a flexible, efficient, and dependable Li‑ion battery charging solution.

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FAQ

1. How does this charging module differ from a standard balance charger, and what is its biggest advantage?
Standard hobby balance chargers typically require an external 12–24 V DC power supply and are bulky and inconvenient to carry. This module, in contrast, connects directly to an ordinary QC fast‑charge adapter via Micro‑USB or USB‑C, essentially eliminating the need for a bulky power supply. It uses the high voltage (9 V/12 V) from a phone fast charger and a synchronous buck converter to efficiently charge 2–3S Li‑ion batteries with low heat dissipation, making it ideal for outdoor drone pilots and lightweight charging setups.

2. Which fast‑charge protocols does the module support? Will it work with a standard 5 V charger?
It supports QC2.0 and QC3.0 fast‑charge protocols and automatically negotiates 9 V or 12 V input. If used with a standard 5 V charger that does not support fast charging, the module cannot request a higher voltage, output power drops dramatically, and it may be unable to charge multi‑cell Li‑ion batteries properly. Always pair it with a QC2.0/3.0 charger for optimal charging speed.

3. How do I select between 2S and 3S? Will connecting the wrong battery cause damage?
A jumper or dip switch on the board selects the cell count (2S or 3S). Before connecting a battery, always verify the switch position matches the battery's configuration. The module features reverse‑polarity protection on the input, but may not have automatic cell‑count detection. If the switch is set to 3S but a 2S battery is connected, the module may overcharge because the target voltage is too high, damaging the battery or creating a safety hazard. Always check the setting before each charge.

4. What does "synchronous rectification" mean, and what advantages does it have over conventional buck charging?
Synchronous rectification uses low‑resistance MOSFETs instead of traditional Schottky diodes for rectification, dramatically reducing conduction losses and heat. At 15 W, this means the module runs cool and compact without a large heatsink, and nearly all input energy is delivered to the battery—typical efficiency reaches 93–96%. It is especially well‑suited for battery‑operated outdoor and mobile applications.

5. Does the module have a balancing function? How does it ensure voltage consistency across cells?
It includes a passive balancing circuit that monitors each cell's voltage through the balance connector. During the final charging stage, cells with higher voltage are gently discharged until the voltage difference between all cells is reduced to roughly ±10 mV. This prevents the weakest‑cell effect—where one cell reaches full charge while another remains undercharged—thereby extending the overall life and safety of the battery pack.

6. How fast is 15 W charging in practice? How long does it take to fully charge a 2200 mAh 2S or 3S battery?
15 W is the total input power; actual charging power to the battery is slightly lower. For a 2S Li‑ion pack (nominal 7.4 V), the charge current is about 1.8 A, taking just over one hour to charge a 2200 mAh pack. For a 3S pack (nominal 11.1 V), the charge current is about 1.2 A, taking roughly 1.5 hours. This speed sits between a 1C fast charge and a 0.5C standard charge, providing both efficiency and battery longevity.

7. What do the module's indicators mean? How can I tell when charging is complete?
Typically there are two LEDs: a power indicator (on whenever power is present) and a charge status indicator. During charging, the status LED is usually steady or blinking; when charging is complete it either turns off or stays steady on. Some versions also use rapid blinking to indicate a fault, such as reverse battery connection, over‑temperature, or fast‑charge protocol negotiation failure. Check your specific model's documentation for the exact indicator definitions.

8. Can I use the USB charger to power both this module and my phone at the same time?
Not recommended. When a QC fast charger operates in high‑voltage output mode, the voltage levels and protocol on the data lines differ from standard USB mode, making it impossible to simultaneously charge another device. The module requires exclusive use of the fast charger, so please use a dedicated charger for it.

9. Does the module support pass‑through charging? Can it be used as a UPS?
This module is a dedicated charge management unit and does not include system power‑path management. It does not support simultaneous charging and discharging—drawing power from the battery while charging may cause the module to misjudge the battery state, leading to abnormal charging or even damage. If you need pass‑through capability, choose a solution with dedicated power‑path management.

10. Can I use this module with a 4S or higher battery pack?
This module is designed specifically for 2S‑3S Li‑ion batteries, with a maximum output voltage typically not exceeding 12.6 V (the fully‑charged voltage of a 3S pack). It cannot provide the higher voltage required by 4S and above packs. Forcing a 4S battery onto it will leave the module permanently in charging mode because it cannot reach the constant‑voltage target, potentially damaging the battery. For 4S or higher packs, use a fast‑charge module or hobby balance charger specifically rated for that cell count.