8.4V 2A Li-ion Battery Charger for 2S 7.4V Battery
Phonix® FX8402000 – 8.4V 2A Li-ion Battery Charger for 2S 7.4V Packs
Compact and high-efficiency charger designed for 2S 7.4V Li-ion battery applications.
• With intelligent charging (Pre-charge, CC, CV, Auto Cut-off)
• Dual-color LED indicators
• Full safety protections including OVP, OCP, short-circuit and reverse polarity protection
• Globally certified with CE, UL, TUV, FCC, PSE, CCC
• Reliable quality with 5-year warranty
• OEM and ODM services welcome
• Suitable for LED lighting, surveillance equipment, electric tools, toys and other portable electronics.
Description
Adapt for: 2S 7.4V Li-ion Battery | LiPo Battery Pack
Model: FX8402000
AC Input: 100~240V
DC Output: 8.4V 2A
Application: 2S 7.4V 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
Size: 70 * 45 * 38 mm
Net Weight: 150g
Industry: Security System, Lighting Industry, Power Tools
Brand: Phonix®
| FX8402000 8.4V 2A Li-ion Charger for 2S 7.4V Battery Specification | ||
| Item | Specification | Remark |
| 1. Input | ||
| Rating input voltage | 100~240 Vac 50/60 Hz | Global wide voltage input |
| Input voltage range | 90~264 Vac | |
| Rating input current | 0.22 A/RMS | Input: 100Vac, Output: Full load |
| Max input power | 22 W | Input: 100Vac, Output: Full load |
| 2. Output | ||
| No load output voltage | DC 8.4 V | |
| Output voltage range | DC 7.4V~8.4 V | Perfect for 2S Lithium packs |
| Suit with battery type | 2S Li-ion battery | Also fits 7.4V LiPo packs |
| Charging current | 2 A ±10% | Constant Current (CC) stage |
| Charging voltage | DC 8.4 V ±0.2 V | Constant Voltage (CV) stage |
| Pre-charge | 0.8 A ±0.1 A | Voltage ≤ 5.6V Pre-charging |
| Charge-end current | ≤ 0.3 A ±10% | Smart cut-off current |
| Timer | – | |
| Max output power | 18 W | |
| Ripple voltage | ≤ 168 mV | Full load |
| 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 | ≥ 85% | Full load @ 220 V |
| 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 | 5 MM / 50HZ / 600 S | Non-operating condition |
| Impact resistance | 1 meter drop test 3 times | Non-operating condition |
| 4. Mechanical | ||
| Weight | 150 g | Compact desktop layout |
| Size | 70 * 45 * 38 mm | Casing only |
| Connector | Refer to order | Customizable (e.g., 5.5*2.1mm DC, 3-pin XLR, T-plug) |
| 5. Safety | ||
| Max. temperature rise | < 40°C on casing | Full load operation |
| Safety approval | CE / TUV / FCC / PSE / CCC | Global markets compliance |
| MTBF | 50000 H | Industrial grade grade component life |
| ESD | 8.0 KV | |
| Hi-Pot Insulation | i/p to o/p: 3000V (1 min) | High voltage insulation test passed |
Frequently Asked Questions (FAQ)
Q1: Can I use this 8.4V 2A charger for a 7.4V Lithium-ion or LiPo battery pack?
A: Yes. A standard nominal 7.4V lithium-ion or lithium-polymer battery pack consists of two cells in series (2S). When fully charged, each cell reaches 4.2V, making the total full charge voltage exactly 8.4V. The FX8402000 is custom-engineered specifically for this 2S configuration.
Q2: How does the built-in intelligent protection system secure the charging process?
A: The FX8402000 features multiple industrial-grade protection layers: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Short-Circuit Protection, and Reverse Polarity Protection. If a short circuit or wrong connection occurs, the charger automatically cuts off the output and the LED status indicators will flash to alert the user, returning to normal operation once the fault is removed.
Q3: What do the flashing LEDs mean on the FX8402000 charger?
A: The smart double-color LED display intuitive communicates the charging phase:
• Flashing One by One: The battery is currently charging under safe current.
• All LEDs ON: Charging is finished and the battery pack is fully charged.
• All LEDs OFF: No battery is detected by the charger terminals.
• All LEDs Flashing: Error status (triggered shorted or reversed polarity protection).
Q4: Why does this charger feature a 0.8A pre-charge current stage?
A: When a 2S battery pack is over-discharged (voltage drops below 5.6V), forcing a high 2A current can damage the internal structure of the cells. The Phonix® smart algorithm activates a gentle 0.8A pre-charge stage to safely recover the cell voltage first, maximizing your industrial battery packs’ longevity.
Technical Application & B2B Procurement Guide
Ideal Applications:
With an optimized 18W max output and certified global compliance, the FX8402000 8.4V 2A industrial charger is widely integrated into:
- Surveillance & Security Equipment: Wireless CCTV cameras, portable field monitors, and portable telecom testing gear.
- Lighting Industry: High-intensity LED miners’ lamps, diving lights, and emergency industrial signaling systems.
- Portable Electronics & Tools: Electric tools, professional RC models/toys, and mobile medical instruments using 2S 7.4V battery architectures.
Why Partner with Phonix®?
As an OEM/ODM industrial provider, Phonix® supports international trade buyers with fully custom-tailored solutions. We offer customizable DC output cables and connector plugs (e.g., DC Jack, Aviation plugs, Alligator clips) tailored to your application’s requirements. Every production unit passes rigorous 3000V Hi-Pot insulation testing, 8.0KV ESD shielding tests, and comes backed by a 5-year warranty. Contact our engineering team for bulk wholesale pricing, MOQ adjustments, and custom project consultation.
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