VTC-LP403449 3.7V 650mAh Li-ion Polymer Battery Pack
This article summarizes the source DOCX specification for the VTC-LP403449 rechargeable lithium polymer battery pack. The content focuses on buyer-facing electrical parameters, pack structure, protection design, application fit, and OEM/ODM supply considerations.
Product Overview
The VTC-LP403449 is specified as a Li-ion polymer rechargeable battery manufactured and supplied by VTC Power Co., Ltd. The model is built for compact rechargeable equipment using a 3.7V nominal voltage and 650mAh nominal capacity pouch-cell format. The datasheet also lists 670mAh rated capacity and 630mAh minimum capacity at 0.2C discharge.
Core Electrical Parameters
| Parameter | Specification |
|---|---|
| Model | VTC-LP403449 |
| Battery Type | Li-ion Polymer Rechargeable Battery Pack |
| Nominal Voltage | 3.7V |
| Nominal / Rated Capacity | 650mAh nominal; 670mAh rated; 630mAh minimum at 0.2C discharge |
| Charge / Discharge Limits | 4.2V limited charge voltage; 3.0V discharge cut-off voltage |
| Standard Current | 130mA standard charging current; 130mA standard discharging current |
| Rapid / Maximum Current | 650mA rapid charging current; 650mA maximum discharging current; 1500mA peak discharging current |
| Pack Dimensions / Weight | 4.2mm max thickness x 34.5mm max width x 51.0mm max height; approx. 13g |
| Wire / Protection Components | 50±3mm wire; S8261DAI protection IC; DP8205 MOSFET; 10K±1% NTC, B3435±1% |
| Operating Conditions | Charging: 0~45°C; discharging: -20~60°C; humidity: ≤90%RH |
Cell and Pack Size
The source drawing defines the cell as a 403449 pouch format with 4.0mm initial maximum thickness, 34.0mm maximum width, and 49.0mm maximum height. The pack drawing gives a maximum 4.2mm thickness, 34.5mm width, and 51.0mm height. These values are important for enclosure design, battery cavity clearance, and mechanical tolerance checks.
Protection Circuit and NTC
The PCB specification lists over-charge, over-discharge, over-current, and short-circuit protection functions. The parts list identifies an S8261DAI-M6T1U protection IC, DP8205 MOSFET, 330 ohm and 470 ohm resistors, 10K NTC with B3435 value, and a 0.1uF/25V capacitor. This supports OEM pack integration where a protected rechargeable lithium polymer pack is required.
Cycle Life, Storage, and Operating Conditions
The electrochemical characteristics table states a cycle-life criterion of not less than 600 cycles under the defined 0.2C charge and 0.2C discharge test method, ending when discharge capacity is reduced to 80% of rated capacity. The self-discharge criterion is not less than 85% of initial capacity after 28 days at 20+/-5 degC. For operating conditions, charging is specified at 0 to 45 degC and discharging at -20 to 60 degC, with operating humidity up to 90%RH.
Application Fit
The LP403449 pack is best matched to compact rechargeable electronics that need a small 3.7V lithium polymer pack rather than high-drain power-tool style performance. Suitable examples include smart metering modules, handheld terminals, wireless environmental sensors, logistics trackers, compact remote controllers, security accessories, and wearable modules.
OEM/ODM Supply Notes
VTCBATT can support factory-direct lithium polymer battery pack supply for OEM devices, including wire length adjustment, connector matching, NTC configuration, PCM review, print labeling, sample development, and wholesale batch production. Final connector and wire configuration should be confirmed against the project drawing and production sample because the source product photo and the DOCX pack drawing show different visible wire/connector details.
