VTC-LP443441H 3.7V 650mAh Li-ion Polymer Battery: Engineering and Integration Guide
VTCBATT supplies the VTC-LP443441H rechargeable lithium polymer battery for compact single-cell electronics. Its 3.7V nominal voltage, 650mAh nominal capacity and integrated protection board provide a defined starting point for OEM power-system design. Factory-direct customization and battery wholesale support are available following engineering review of the requested configuration.
Electrical Specifications
| Parameter | Specification |
|---|---|
| Model | VTC-LP443441H |
| Battery type / configuration | Rechargeable Li-ion polymer / single cell with PCM |
| Nominal voltage | 3.7V |
| Capacity at 0.2C | Nominal 650mAh; rated 670mAh; minimum 640mAh |
| Charge / discharge cut-off | 4.2V / 3.0V |
| Charging current | Standard 130mA (0.2C); rapid 650mA (1C) |
| Discharging current | Standard 130mA; rapid 650mA; peak 1300mA |
| Maximum pack dimensions | 4.6 × 34.5 × 43.0mm (T × W × H) |
| Protection and leads | S8261DAI-M6T1U + dp8205; UL3302 28AWG; 20 ± 3mm leads |
| Operating temperature | Charging 0–60°C; discharging −20–80°C |
Cell weight is approximately 12g. Initial impedance is ≤180mΩ at 1kHz AC, measured at 3.7V. Initial voltage is ≥3.8V.
Cell and Pack Dimensions
| Label | Description | Dimension |
|---|---|---|
| A | Cell tab length | 4–8mm |
| B | Cell tab pitch | 22 ± 1.5mm |
| C | Cell tab width | 3 ± 0.2mm |
| D | Cell top sealant length | 5 ± 1mm |
| T | Cell thickness, initial maximum | 4.4mm |
| T | Cell thickness after 500 cycles | 4.7mm |
| W | Cell width maximum | 34.0mm |
| H | Cell height maximum | 41.0mm |
| T | Pack thickness maximum | 4.6mm |
| W | Pack width maximum | 34.5mm |
| H | Pack height maximum | 43.0mm |
| L | Wire length | 20 ± 3mm |
| L1 | Stripped lead length | 3 ± 0.5mm |
Pack dimensions and aged-cell dimensions describe different conditions. Include swelling and assembly tolerance in the enclosure review.
Charging and Discharge Integration
Standard charging uses 130mA constant current to 4.2V, followed by constant voltage until current falls to 0.01C. Standard charge time is 6–7 hours; rapid charge at 650mA is specified at 1.5 hours. Standard discharge is 130mA to 3.0V. Review rapid and peak-current behavior against the actual device duty cycle.
Protection Board and Wiring
The S8261DAI-M6T1U IC and dp8205 MOSFET manage the documented protection functions. The following values are minimum / typical / maximum; they are not normal charger or load operating setpoints.
| Protection parameter | Min. / Typ. / Max. |
|---|---|
| Overcharge protection | 4.260 / 4.280 / 4.300V |
| Overcharge release | 4.130 / 4.180 / 4.230V |
| Overcharge delay | 0.7 / 1 / 1.3s |
| Over-discharge protection | 2.950 / 3.000 / 3.050V |
| Over-discharge release | 2.900 / 3.000 / 3.100V |
| Over-discharge delay | 179 / 256 / 333ms |
| Discharge overcurrent protection | 2.0 / 3.5 / 4.5A |
| Board internal resistance | — / 45 / 60mΩ |
| Operating static current | 1.5 / 5 / 8µA |
| Power-down current | — / — / 0.5µA |
| Short-circuit protection delay | 196 / 280 / 364µs |
The board overcurrent trip threshold must not be used as a battery discharge rating. The tab and lead assembly uses two UL3302 28AWG wires. A connector and NTC are not part of the documented configuration.
Temperature and Storage
The specified operating range is 0–60°C for charging and −20–80°C for discharge, with operating humidity ≤90%RH. Capacity and lifetime at temperature extremes require project validation. Recommended storage is 15–35°C and ≤85%RH. For long storage, maintain 3.6–3.9V and recharge every six months. Short storage below one month is specified at −20–45°C; storage above three months at −10–45°C, both at ≤90%RH.
Performance Acceptance Criteria
The following are qualification requirements, not batch measurement results. Request test records for the intended supply configuration.
| Item | Acceptance criterion |
|---|---|
| 0.2C capacity | At least nominal capacity after standard charge and 5-minute rest; discharge to 3.0V. |
| 1C capacity | At least 90% of nominal capacity after standard charge and 5-minute rest; discharge to 3.0V. |
| Cycle-life criterion | At least 600 cycles: 0.2C CC-CV charge to 4.2V, termination at 0.02C; 0.2C discharge to 3.0V; endpoint at 80% of rated capacity. |
| 28-day retention | At least 85% of initial capacity after storage at 20 ± 5°C, followed by 0.2C discharge. |
Application Selection
Potential uses include indoor air quality monitors, Bluetooth audio receivers, handheld barcode scanners, presentation remotes and portable data loggers. Review enclosure clearance, average and peak load, charger compatibility and operating temperature before selecting the battery. Ask VTCBATT about lead length, connectors, labeling and wholesale quantities; changes require a confirmed drawing and specification.
These are integration candidates, not claims of compatibility with particular finished devices. Compare the load profile, available pack space and charging system before approval.
Choosing Capacity and Mechanical Fit
| Option | Selection consideration |
|---|---|
| LP443441H | 650mAh nominal; 4.6 × 34.5 × 43.0mm maximum pack envelope |
| Smaller capacity options | Consider the linked 500mAh product only after comparing dimensions and current requirements |
| Larger capacity options | Explore the 1000mAh LiPo range when more energy is required and space permits |
Compare 3.7V 500mAh Li-poly batteries and the 1000mAh LiPo battery range.
OEM Supply and Technical Review
Send your mechanical drawing, charge and load profile, connector requirements and purchase quantities for an engineering review and quotation. Confirm model-specific compliance documentation and commercial warranty terms with the quotation.
