4.2V 2A Wall Plug Li-ion Battery Charger for 1S 3.7V Battery
Phonix® 4.2V 2A charger designed for 1S 3.7V Li-ion/LiPo batteries. High efficiency and full safety protections including OVP, OCP, and SCP. Globally certified (CE, UL, FCC, PSE) with a compact wall-plug design ideal for LED lighting, security equipment, and portable devices. Available with US, UK, EU, AU, DE, ES, JP, and ZA plug types. Backed by a 5-year 100% warranty for worry-free quality assurance. OEM/ODM customization supported.
Description
Adapt for: 1S 3.7V Li-ion Battery | LiPo Battery | Lithium Battery
Model: FX0422000
AC Input: 100~240V
DC Output: 4.2V 2A
Application: 1S 3.7V Li-ion Battery Pack
Charge Process: Pre-charge, CC, CV and Automatically Cut-off
Charger Indicator: Double color LED for power capacity show
Output Protections: OVP, OCP, Shorted, Reversed Protection
Safety Approval: CE, UL, TUV, FCC, PSE, CCC, SAA, C-TICK, RCM
Size: L62 * W40.2 * H31 mm
Net Weight: 90g
Industry: Security System, Lighting Industry
Brand: Phonix®
| FX0422000 4.2V 2A Wall Plug Charger for 1S Li-ion Battery Specification | ||
| Item | Specification | Remark |
| 1. Input | ||
| Rating input voltage | 100~240 Vac 50/60Hz | Global voltage compatibility |
| Input voltage range | 90~264 Vac | |
| Rating input current | 0.15 Arms | Input: 100V, Output: Full load |
| Max input power | 15 W | Input: 100V, Output: Full load |
| 2. Output | ||
| No load output voltage | DC 4.4V | |
| Output voltage range | DC 3.7V~4.2V | Optimized for 1S Li-ion cell |
| Suit with battery type | 1S Li-ion battery | Also fits 3.7V LiPo batteries |
| Charging current | 2A ±10% | Constant Current (CC) stage |
| Charging voltage | DC 4.2V ±0.2V | Constant Voltage (CV) stage |
| Pre-charge | 0.2A ±0.1A | Voltage ≤ 2.8V Pre-charging |
| Charge-end current | ≤ 0.2A ±10% | Smart cut-off threshold |
| Timer | – | |
| Max output power | 10 W | |
| Ripple voltage | ≤ 42 mV | Full load @ low ripple |
| Power LED | Red | Power on |
| Charging LED | All off | No battery detected |
| All on | Finished / Fully charged | |
| All flashing | Error / Fault status | |
| Flashing one by one | Charging in progress | |
| Shorted Protection | Yes | Automatic recovery |
| Reversed Protection | Yes | Automatic recovery |
| Efficiency | ≥ 80% | Full load @ 220V |
| 3. Environment | ||
| Operate temperature | -10 ~ +40°C | |
| Operate humidity | < +90% | Relative humidity |
| Storage temperature | -40 ~ +70°C | |
| Storage humidity | 0 ~ +95% | Relative humidity |
| Cooling | Natural convection | |
| Vibration resistance | 5MM/50HZ/600S | Non-operating condition |
| Impact resistance | 1 meter drop test 3 times | Non-operating condition |
| 4. Mechanical | ||
| Weight | 90g | Ultra-lightweight compact design |
| Size | L62 * W40.2 * H31 mm | Casing only |
| Connector | Refer to order | Customizable (e.g., DC 5.5*2.1mm, JST, Micro USB) |
| 5. Safety | ||
| Max. temperature rise | < 40°C on casing | Safe to touch |
| Safety approval | CE / UL / TUV / FCC / PSE / CCC / SAA / RCM | Global market compliance |
| MTBF | 50000H | Industrial grade longevity |
| ESD | 8.0KV | |
| Hi-Pot Insulation | i/p to o/p: 3000V (1 min) | High voltage safety test passed |
Frequently Asked Questions (FAQ)
Q1: Is this 4.2V 2A charger suitable for 3.7V LiPo (Lithium Polymer) batteries?
A: Yes, absolutely. The FX0422000 is fully compatible with both standard 3.7V/3.6V Li-ion cells and 3.7V LiPo batteries. It charges them up to a safe maximum voltage of 4.2V using a precise CC/CV charging profile.
Q2: What plug options are available for this wall plug-in charger?
A: As a global OEM/ODM manufacturer, we offer full customizable wall plug options to fit different regional markets, including US plug, EU plug, UK plug, and AU plug configurations. All variants comply with corresponding regional safety standards such as UL, CE, SAA, and RCM.
Q3: How do I read the LED indicators during the charging process?
A: The intelligent double-color LED indicator provides real-time status updates:
• Flashing One by One: Charging is active.
• All LEDs ON: Charging complete (fully charged).
• All LEDs OFF: No battery is connected.
• All LEDs Flashing: An error has occurred (e.g., short-circuit or reverse polarity protection triggered).
Q4: What is the pre-charge stage, and how does it protect my battery?
A: If your 1S battery is deeply discharged (voltage ≤ 2.8V), the charger safely initiates a low 0.2A pre-charge current. This gently revives the battery cells, preventing thermal shock and internal damage, before switching to the fast 2A Constant Current (CC) charging stage.
Technical Application & B2B Procurement Guide
Ideal Applications:
With its compact wall-plug form factor and comprehensive global certifications (CE/UL/TUV/SAA/RCM), the FX0422000 4.2V 2A charger is the preferred choice for:
- Security Systems: Smart doorbells, wireless security cameras, and standalone alarm sensors.
- Lighting Industry: LED flashlights, portable work lights, and emergency exit signs.
- Consumer Electronics & IoT: Handheld medical devices, IoT nodes, and remote control hardware running on 1S battery systems.
Why Partner with Phonix®?
Every single FX0422000 charger features industrial-grade construction with 3000V Hi-Pot insulation, an 8.0KV ESD tolerance, and a 1-meter drop test certification. We provide flexible B2B customization options, including custom DC output connector types (DC Jack, JST, Crocodile clips) and cable lengths. Contact our engineering team for bulk quote, MOQ, and technical datasheets.
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