402030 Polymer Battery: Power Solution for Ultra-Thin Devices
The 402030 lithium polymer battery is a highly versatile rechargeable pouch cell measuring 4.0 mm in thickness, 20.0 mm in width, and 30.0 mm in length, delivering a nominal capacity of 200 mAh at 3.7V (0.74 Wh). Serving as an industry benchmark for ultra-slim portable electronics, digital voice recorders, micro dashcams, wireless headsets, and IoT sensor nodes, the 402030 delivers stable continuous discharge currents up to 1C (200 mA) and transient pulse capabilities up to 2C (400 mA). Featuring an initial AC impedance ≤ 90 mΩ, exceptional cycle durability exceeding 500 cycles at ≥ 80% capacity retention, and an integrated dual-MOSFET protection module, it balances compact volumetric space utilization with robust electrical performance.
1. The 4.0 mm Profile: Ergonomic Benchmark for Ultra-Thin Devices
Modern consumer and industrial handheld devices converge on sleek, sub-10 mm product enclosures. In such slim architectures, every millimeter allocated to battery thickness directly constraints PCB component layout, thermal heat sinks, and exterior industrial styling. The GEB 402030 3.7V 200mAh LiPo Cell provides an optimal 4.0 mm nominal thickness profile that fits seamlessly beside single-sided SMT printed circuit boards.
Compared to smaller micro-cells (such as 402025 at 150 mAh), the additional 5.0 mm of body length in the 402030 grants a 33% increase in usable capacity (200 mAh vs. 150 mAh) without requiring any increase in device thickness or width. This makes it the preferred upgrade choice for product revisions requiring extended battery runtime.
2. Electrical and Mechanical Specification Parameters
Below are the comprehensive electrical, mechanical, and environmental ratings for the industrial-grade GEB 402030 battery:
| Specification Field | Value | Test Condition / Benchmark |
|---|---|---|
| Nominal Voltage | 3.7 V | Standard 0.2C discharge platform |
| Rated Capacity | 200 mAh (min. 195 mAh) | 0.2C discharge to 3.0V cutoff at 25°C |
| Total Energy | 0.74 Wh | Based on nominal voltage and capacity |
| Maximum Charge Voltage | 4.20 V ± 0.03 V | CC/CV charging method |
| Standard Charge Current | 40 mA (0.2C) to 100 mA (0.5C) | Cutoff at 0.02C (4 mA) |
| Max Continuous Discharge Current | 200 mA (1.0C continuous) | Temperature rise < 15°C |
| Peak Pulse Current | 400 mA (2.0C for ≤ 2 seconds) | Audio amplifier / RF bursts |
| Internal Impedance (AC IR) | ≤ 90 mΩ | 1 kHz AC at 100% SoC |
| Dimensions (T × W × L) | Max 4.2 mm × 20.5 mm × 30.5 mm | Including edge folding and tape |
| Average Cell Weight | Approx. 4.6 g ± 0.3 g | Bare cell with standard leads |
3. Mechanical Cavity Design and Swelling Mitigation
When engineering mechanical cavities for the 402030, product teams must account for both initial manufacturing tolerances and long-term cyclic swelling. The table below outlines recommended enclosure volume clearances:
| Dimension Axis | Cell Max Size | Swelling Allowance | Recommended Chassis Cavity |
|---|---|---|---|
| Thickness (Z-Axis) | 4.2 mm | +0.35 mm (approx. +8.5%) | ≥ 4.65 mm |
| Width (X-Axis) | 20.5 mm | +0.30 mm | ≥ 21.2 mm |
| Length (Y-Axis) | 30.5 mm | +1.5 mm (for PCM & tab fold) | ≥ 32.5 mm |
4. Advanced PCM Protection Board Architecture
To safeguard against deep over-discharge (which causes copper dissolution and irreversible capacity loss) and high-voltage overcharging, GEB equips the 402030 with a high-reliability hardware protection module. The circuit features independent dual N-channel power MOSFETs that keep total internal on-resistance below 25 mΩ, ensuring minimal voltage drop under 200 mA continuous loads.
The PCM maintains an ultra-low quiescent current (< 2.5 μA in standby, < 0.1 μA in deep overdischarge sleep), protecting the cell from going into permanent lockout during prolonged consumer storage.
Frequently Asked Questions (FAQ)
How does temperature affect the usable discharge capacity of the 402030?
At room temperature (25°C), the 402030 delivers 100% of its 200 mAh rating. At 0°C, usable capacity decreases slightly to approximately 88% (176 mAh), and at -10°C, capacity is approximately 75% (150 mAh) under a 0.2C discharge rate due to elevated electrolyte viscosity. For sub-zero operations, custom low-temperature electrolyte formulations are available.
Can the 402030 be charged with a standard 5V USB power supply?
Never connect the battery directly to a 5V supply! Lithium polymer cells require a dedicated linear or switching charge controller IC (such as TP4056, BQ24040, or equivalent) configured for a precise CC/CV profile with a 4.20V (±30 mV) termination voltage.
What lead wire and connector options are available for the 402030?
GEB offers customizable wiring configurations including UL1571 / UL1006 AWG 28 or AWG 30 lead wires, customized lengths from 20 mm to 150 mm, and termination connectors including JST PHR-2, Molex 51021, and JST SHR.
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