16.8V 5A Li-ion Battery Charger for 4S 14.8V Battery
The Phonix® FX1685000 is a high-current 16.8V 5A Li-ion battery charger optimized for 4S 14.8V Lithium-ion and Li-Po battery configurations requiring rapid replenishment. Engineered to support an 84W continuous DC output, this fanless charger features an enlarged high-surface-area casing that provides exceptional natural cooling for heavy-duty industrial tools, high-capacity RC equipment, and larger LED lighting grids. Managed by an onboard MCU, it safely controls the entire charging cycle (Pre-charge, Constant Current, Constant Voltage, and Auto Cut-off) with dual-color LED feedback and active hardware safety latch-offs for over-voltage, over-current, short-circuit, and reverse polarity protection. Rated for rigorous duty cycles with a 30,000-hour MTBF and backed by a 3-year factory warranty, this flagship model carries full regulatory compliance (UL, CE, TUV, FCC, PSE, CCC) for international enterprise deployment.
Description
High-Output 84W Power Delivery & Optimized Air Cooling
The Phonix® FX1685000 is our maximum-current charging solution within the 4S range, designed to decrease charging time for high-capacity battery cells. To manage the 84W power delivery without utilizing loud or failure-prone cooling fans, the internal circuit layout is integrated into a spacious flame-retardant casing ($133 \times 58 \times 31\text{ mm}$). This configuration allows optimal natural air convection, ensuring the external shell temperature rise remains under < 40°C during continuous full-load charging. It provides a clean, low-ripple DC output that prevents cell stress during rapid energy transfer, making it ideal for professional equipment settings.
Technical Parameters
| Category | Technical Parameter | Engineering Specification | Remarks / Test Conditions |
|---|---|---|---|
| 1. Input Specs | Rating Input Voltage | 100 ~ 240 Vac | 50/60 Hz Universal Input |
| Input Voltage Range | 90 ~ 264 Vac | Grid variance tolerance window | |
| Rating Input Current | 2.5 A / RMS | @ 100V Input, Full Load (With safety margin) | |
| Max Input Power | 95W | @ 100V Input, Full Load | |
| 2. Output Specs | No Load Output Voltage | DC 16.8 V | Precision voltage reference |
| Output Voltage Range | DC 14.8V ~ 16.8V | Dynamic curve regulation | |
| Charging Current | 5A ±10% | High-rate Constant Current (CC) stage | |
| Charging Voltage | DC 16.8 V ±0.2 V | Constant Voltage (CV) saturation window | |
| Pre-charge Current | 0.5A ± 0.1A | Triggers when battery voltage ≤ 12V | |
| Charge-end Current | ≤ 1.0A ±10% | Auto cut-off current threshold | |
| Suitable Battery Type | 4S Li-ion / Li-Po Battery Packs | Optimized for 14.8V nominal voltage configurations | |
| Timer Protection | — | Continuous state tracking | |
| Max Output Power | 84W | Continuous maximum power output | |
| Ripple Voltage | ≤ 168mV | Full load, Peak-to-Peak (Vp-p value) | |
| Efficiency | ≥ 89% | Full load @ 220V AC input | |
| 3. Protection & Indicators | Short-Circuit / Reversed Protection | Yes / Yes | Instant hardware cutoff with automatic recovery |
| Power LED State | Red | AC input source active | |
| Charging LED (No Battery) | All Off | Standby open-circuit state | |
| Charging LED (Active Charge) | Flashing One by One | Multi-stage charging in progress (Capacity feedback) | |
| Charging LED (Finished) | All On / Green On | Pack fully saturated; automatic cutoff active | |
| Charging LED (Error State) | All Flashing | Fault latch active (Short circuit, Reverse, Over-temp) | |
| 4. Environmental | Operating Temperature | -10°C ~ +40°C | Continuous operation at stable full load |
| Storage Temperature | -40°C ~ +70°C | Suitable for multi-zone shipping transit stress | |
| Operating / Storage Humidity | < 90% RH / 0 ~ 95% RH | Non-condensing moisture thresholds | |
| Cooling Mechanics | Natural Convection | Silent fanless heat dissipation | |
| Vibration Resistance | 5MM / 50HZ / 600S | Non-operating multi-axis vibration verification | |
| Impact Resistance | 1-meter drop test, 3 times | Casing structural integrity certified | |
| 5. Mechanical | Weight | 400g | Net weight excluding electrical cords |
| Dimensions | 133 * 58 * 31 mm | High-impact flame-retardant shell layout | |
| Output Connector | Refer to Order Guide | Highly customizable termination geometries | |
| 6. Safety & Reliability | Max Temperature Rise | < 40°C on casing | Measured at maximum stable power envelope |
| Safety Approvals | CE, TUV, FCC, PSE, CCC | Certified for direct global market shipping | |
| MTBF | 100,000 Hours | Calculated via continuous stress profiles | |
| ESD Immunity | 8.0 KV | Electrostatic isolation safety threshold | |
| Hi-Pot Insulation | i/p to o/p: 3000V (1 min) | Primary to secondary electrical testing |
Sequential Display Monitoring & Factory OEM Service
The integrated multi-LED display tracks capacity real-time during fast-charging sequences, giving clear visibility to workshop technicians. If your equipment setup requires less aggressive current delivery to prolong the operating cycle of smaller cells, you can evaluate our mid-range 16.8V 3A Li-ion battery charger alternative. Phonix® provides full factory-level OEM/ODM customization paths for global distribution, allowing procurement managers to select country-specific AC power cords (US, EU, UK, AU, JP) and specify heavy-duty output connectors such as XLR, GX16 Aviation plugs, Anderson links, or high-amp XT60 and XT90 connectors certified under official UL standards.
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