21V 4A Li-ion Battery Charger for 5S 18.5V Battery
To secure optimal uptime and steady operational throughput for distributed warehouse logistics, material handling equipment, and portable industrial instrumentation, the Phonix® FX2104000 coordinates an 84W continuous power delivery profile as a commercial-grade 21V 4A Li-ion battery charger. Specifically calibrated to extend battery life and suppress localized voltage imbalances across 5S 18.5V Lithium-ion and Li-Po battery architectures, this convection-cooled desktop system features an optimized internal topology that eliminates acoustic and mechanical vulnerabilities. The fully sealed, high-impact enclosure completely shields primary control paths from conductive airborne carbon dust, manufacturing debris, and ambient humidity within a compact 154X60X36 mm structural footprint. Operating at a verified full-load energy efficiency of ≥ 88.5% to attenuate internal thermal building, the charging matrix integrates an autonomous monitoring microprocessor that executes hardware-level latching protections against output short-circuits, over-voltage, and reverse-polarity cross-connections. Engineered for seamless deployment into enterprise multi-shift infrastructure backed by a 100,000-hour MTBF and an authoritative 5-year factory warranty, this 4A fast-charging solution fully satisfies strict global engineering bids and corporate compliance frameworks (UL, CE, TUV, FCC, PSE, CCC).
Description
High-Utilization Fleet Charging via Passive Fanless Thermal Isolation
Deploying heavy-use charging hubs on industrial plant floors or within distributed automated guided vehicle (AGV) stations mandates charging hardware that can operate continuously without mechanical intervention. The Phonix® FX2104000 implements a durable, fire-retardant solid polymer housing measuring 154X60X36 mm (weighing 380g) meticulously engineered for natural convection cooling. By removing mechanical cooling fans, which routinely draw in abrasive workshop dust, fine metallic filings, and moisture paths that cause generic charging circuits to short out, this robust design secures system continuity. Internal component geometry is structurally balanced to keep outer case temperature elevation below < 40°C during peak constant-current bulk charging, preventing component value drift and maintaining safe thermal profiles over long-term multi-shift service lives.
Technical Parameters
| Category | Technical Parameter | Engineering Specification | Remarks / Test Conditions |
|---|---|---|---|
| 1. Input Specs | Rating Input Voltage | 100 ~ 240 Vac | 50/60 Hz Global Main Grid Universal Compliance |
| Input Voltage Range | 90 ~ 264 Vac | Maintains uninterrupted continuous charging through localized line sags | |
| Rating Input Current | 0.97 A / RMS | @ 100V AC Input, Full Load (Audited with Mandatory Active PFC, PF ≥ 0.98) | |
| Max Input Power | 94.9W | Calculated closed-loop baseline: Pout (84W) ÷ Efficiency (88.5%) | |
| 2. Output Specs | No Load Output Voltage | DC 21.0 V | Precision voltage reference window; completely eliminates cell overcharging |
| Output Voltage Range | DC 18.50V ~ 21.0V | Dynamic closed-loop saturation tracking regulation curve | |
| Charging Current | 4A ±10% | High-rate Constant Current (CC) constant bulk injection phase | |
| Charging Voltage | DC 21.0 V ±0.2 V | Constant Voltage (CV) saturation management curve | |
| Pre-charge Current | 0.4A ± 0.1A | Automated gentle cell reactivation mode active when loop voltage ≤ 15V | |
| Charge-end Current | ≤ 0.4A ±10% | Strict 10% cutoff rule to suppress electrochemical cell polarization | |
| Suitable Battery Type | 5S Li-ion / Li-Po Battery Assemblies | Calibrated parameter matching for 18.5V nominal enterprise arrays | |
| Timer Protection | — | Autonomous internal hardware phase runtime limiter | |
| Max Output Power | 84W | Continuous continuous output power envelope (21V X 4A) | |
| Ripple Voltage | ≤ 168mV | Full load, Peak-to-Peak (Vp-p high-frequency smoothing filtering) | |
| Efficiency | ≥ 88.5% | Full load @ 220V AC (Standard low-power segment benchmark) | |
| 3. Protection & Indicators | Short-Circuit / Reversed Protection | Yes / Yes | Instant microsecond solid-state isolation cutoff and latching lockout |
| Power LED State | Red | Primary AC mainline input verified active | |
| Charging LED (No Battery) | All Off | Open-circuit standby verification status | |
| Charging LED (Active Charge) | Flashing One by One | Active sequential capacity tracking output indication | |
| Charging LED (Finished) | All On / Green On | 100% cell saturation reached; automated standby safety lock engaged | |
| Charging LED (Error State) | All Flashing | Fault loop latch active (Over-temperature, line short, reverse connections) | |
| 4. Environmental | Operating Temperature | -10°C ~ +40°C | Sustained operation under full thermal stability saturation points |
| Storage Temperature | -40°C ~ +70°C | Protects component structural integration across long-range shipping transit | |
| Operating / Storage Humidity | < 90% RH / 0 ~ 95% RH | Non-condensing atmospheric evaluation limits | |
| Cooling Mechanics | Natural Convection | Zero mechanical noise; zero moving part wear vectors | |
| Vibration Resistance | 5MM / 50HZ / 600S | Meets non-operating equipment transit shock thresholds | |
| Impact Resistance | 1-meter drop test, 3 times | Chassis structural impact retention verified | |
| 5. Mechanical | Net Weight | 380g | Total mass of reinforced infrastructure assembly |
| Dimensions | 154 * 60 * 36 mm | Compact multi-layer mechanical space-saving layout | |
| Output Connector | Refer to Order Guide | Custom terminal options tailored to specific enterprise hardware systems | |
| 6. Safety & Reliability | Max Temperature Rise | < 40°C on casing | Tested under maximum continuous load saturation metrics |
| Safety Approvals | CE, TUV, FCC, PSE, CCC | Direct global shipping compliance authentication | |
| MTBF | 100,000 Hours | Calculated component lifecycle stress profiles | |
| ESD Immunity | 8.0 KV | Electrostatic arc safety separation line | |
| Hi-Pot Insulation | i/p to o/p: 3000V (1 min) | Galvanic primary to secondary safety barrier isolation |
Enterprise Grid Integration & Flexible Fleet Optimization
The integrated dual-color LED signaling matrix provides immediate capacity transparency for depot operators looking after large-scale, multi-tier staging infrastructure. For automated processing stations requiring lower charging profiles to protect less demanding hand-held electronic devices, engineering supervisors can reference our low-current 21V 3A Li-ion battery charger specification data to distribute total branch currents. Phonix® supports comprehensive OEM/ODM hardware modifications, empowering procurement agents to designate specialized heavy-duty DC connectors like multi-point aviation plugs, standard coax configurations, heavy-duty alligator terminals, or high-current Anderson components certified under global UL safety compliance codes.
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