ET-P22
USB-C 2S Li-ion Charger
Charge a 2S (7.4 V) pack from any 5 V USB-C charger
AED 19.00
Out of stockOverview
Charge a 2S (7.4 V) pack from any 5 V USB-C charger
The ET-P22 is built around the Injoinic IP2326 — synchronous boost charger for 2S (8.4V) Li-ion from 5V, up to 1.5A charge, automatic cell balancing.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- 7.4 V robot packs
- Portable speakers
- 2S tool batteries
Key features
What makes it different
Charger
Injoinic IP2326: synchronous boost charger for 2S (8.4V) Li-ion from 5V, up to 1.5A charge, automatic cell balancing
Input
USB-C 5V (any USB-C charger; 5V/2A or more for full speed)
Battery
2S Li-ion / LiPo with balance (mid-point) lead, 7.4V nominal
Status
Charging / full LEDs, NTC input
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Charger | Injoinic IP2326: synchronous boost charger for 2S (8.4V) Li-ion from 5V, up to 1.5A charge, automatic cell balancing |
|---|---|
| Input | USB-C 5V (any USB-C charger; 5V/2A or more for full speed) |
| Battery | 2S Li-ion / LiPo with balance (mid-point) lead, 7.4V nominal |
| Status | Charging / full LEDs, NTC input |
| Size | 30.0 × 25.0 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 3-pin 2.54 mm header · USB-C 16P receptacle (USB 2.0) — USB-C 5V in |
| Main IC | IP2326 (LCSC C2832094) |
| Revision | Rev A |
| Libraries | No software needed (standalone) |
|---|
Performance
Charging
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBUS | Power | 5V from USB-C |
| 2 | GND | Ground | Ground |
| 3 | BAT | Signal | Pack + (8.4V when full) |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-P22 USB-C 2S Li-ion Charger (assembled)
- 1 × 3-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VBUS, GND, BAT
- Libraries: No software needed (standalone)
Compare
Which power board?
| USB-C 2S Li-ion Charger (this board)This board | ET-P21 PT4115 LED Driver 670 mA | ET-P23 LM317 Adjustable Regulator | ET-P24 TPS25947 eFuse Protector | |
|---|---|---|---|---|
| What it does | Charge a 2S (7.4 V) pack from any 5 V USB-C charger | Constant-current driver for 1–8 power LEDs, PWM dimming | Clean adjustable 1.25–28 V linear supply, 1.5 A | Resettable electronic fuse with adjustable current limit |
| Interface | USB-C 5V (any USB-C charger; 5V/2A or more for… | PWM or analog dimming on DIM, 3.3/5V logic | Vout + 3V … 35V | EN input, PG output |
| Best for | 7.4 V robot packs | 3 W power LED lamps | Bench reference voltages | Protecting 12 V projects from shorts |
| Price | 19 AED | 49 AED | 15 AED | 49 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.