Technical Performance Analysis of Rechargeable Battery GRP403530-1C-3.8V-360mAh

7/16/2025 2:25:44 AM


In the realm of miniaturized electronic devices such as smart wearables and IoT sensors, battery energy density, cycle life, and safety directly determine product competitiveness. As a custom soft-pack lithium battery launched by Shenzhen Grepow Battery Co., Ltd., the GRP403530-1C-3.8V-360mAh model demonstrates significant technical advantages in the micro-battery market through its unique material formulation and structural design. This article provides an in-depth analysis of the battery's technical performance across four dimensions: energy density, charge-discharge characteristics, environmental adaptability, and safety certifications.

1. High Energy Density: Core Support for Miniaturization
The GRP403530 battery adopts a laminated soft-pack structure with dimensions of just 40mm (length) × 35mm (width) × 3.0mm (thickness), achieving a nominal capacity of 360mAh and a rated voltage of 3.8V within this compact space. Its volumetric energy density reaches 304Wh/L, significantly surpassing the 200-250Wh/L level of conventional cylindrical lithium batteries. This breakthrough stems from Grepow's proprietary high-compaction-density cathode material and ultra-thin separator technology: by optimizing the particle size distribution of lithium cobalt oxide (LiCoO₂), the cathode material compaction density increases to 3.8g/cm³, 15% higher than the industry average; simultaneously, the use of a 5μm-thick ceramic-coated separator reduces internal resistance to below 80mΩ while maintaining safety.

In smartwatch applications, this battery supports continuous operation for 72 hours under typical usage scenarios. For instance, a bone conduction sports glasses model utilizing a single GRP403530 battery achieves 12 hours of sustained use with Bluetooth audio transmission, heart rate monitoring, and GPS positioning enabled-a 40% improvement in endurance compared to its predecessor.

2. Precise Charge-Discharge Management: Stable Output at 1C Rate
As a consumer electronics-oriented lithium battery, the GRP403530 features optimized charge-discharge strategies. Under its nominal 1C rate (360mA), the battery exhibits exceptional voltage platform stability: the discharge curve slope from 3.8V to 3.0V is merely 0.002V/mAh, far superior to the industry average of 0.005V/mAh. This characteristic ensures stable device performance even at low battery levels, preventing functional abnormalities caused by voltage fluctuations.

Regarding charging efficiency, the battery supports dual modes: 0.5C (180mA) standard charging and 1C (360mA) fast charging. Actual testing shows that with the配套 (matching) charger, the battery charges from 0% to 80% in just 52 minutes, with a total charging time under 75 minutes. Notably, its charging cutoff voltage is set at 4.35V-3.6% higher than the conventional 4.2V-effectively increasing energy storage while employing a three-stage temperature control protection mechanism (triggering current limitation at 60°C/65°C/70°C) to ensure safety under high temperatures.

3. Wide Temperature Range Adaptability: Reliable Operation from Extreme Cold to High Heat
Targeting complex application scenarios such as outdoor sports equipment and automotive sensors, the GRP403530 achieves operational capability across -20°C to 60°C through material modification and structural innovation. In low-temperature environments, the battery employs a low-impedance electrolyte formulation, boosting capacity retention to 75% at -20°C (industry average: ~60%). For high-temperature scenarios, an aerogel thermal insulation layer added to the aluminum-plastic film inner layer effectively blocks external heat transfer, keeping the battery surface temperature 8-10°C lower than ambient at 60°C.

Real-world testing by a drone manufacturer revealed that a micro-drone equipped with GRP403530 maintained voltage fluctuations within ±0.1V during a 30-minute aerial photography mission at -15°C, with power output stability reaching 98.7%-a 12-percentage-point improvement over the previous model.

4. Lifecycle Safety Assurance: Compliance with Stringent International Certifications
Safety remains the top priority in micro-battery design. The GRP403530 implements a six-layer safety protection system for lifecycle risk control:

Structural protection: 0.3mm-thick aluminum-plastic film packaging-50% thicker than conventional products-with a puncture resistance of 12N/mm;
Overcharge protection: Built-in PTC thermistor and CID (Current Interrupt Device) automatically cut off circuits at 4.45V;
Over-discharge protection: An electronic switch activates below 2.5V to prevent copper current collector dissolution at the anode;
Short-circuit protection: A 0.1mm-thick nickel fuse responds within 10ms to currents exceeding 10A;
Crush protection: Withstands 13kN pressure without explosion, meeting IEC 62133-2:2017 standards;
Nail penetration protection: Surface temperature peaks below 85°C during 3mm steel nail penetration at 20mm/s.
The battery has obtained multiple international certifications, including UL1642, IEC62133, and UN38.3. Notably, it passed all 18 rigorous tests in UN38.3 certification-including 1.2m drops, 1.2m vibrations, and high-temperature pressure (130°C)-becoming one of the few micro lithium batteries approved for air transport.

5. Technological Iteration and Market Outlook
With the continuous miniaturization of TWS earbuds, AR/VR glasses, and other devices, global demand for 300-500mAh soft-pack batteries is surging. Grepow has initiated next-generation R&D for the GRP403530, focusing on silicon-based anode materials and solid-state electrolytes to achieve an energy density exceeding 350Wh/L while extending cycle life from 500 to 800 cycles. Industry forecasts suggest the global micro soft-pack lithium battery market will exceed $2 billion by 2026, with high-safety, fast-charging models accounting for over 60% of shipments.

Conclusion
Through material innovation, structural optimization, and rigorous certification, the GRP403530-1C-3.8V-360mAh battery achieves a precise balance between miniaturization, high energy density, and safety. Its technical approach not only provides reliable energy solutions for consumer electronics but also sets new benchmarks for safety-critical applications like medical devices and industrial sensors. As Grepow and other companies drive continuous technological advancements, the energy density and cost boundaries of micro lithium batteries will be repeatedly pushed, injecting sustained momentum into device innovation for the IoT era.

Fudong Communication (Shenzhen) Group Co., Ltd., established in 2004, is a specialized global first tier semiconductor agent/distributor.

Fudong Mall is an online e-commerce platform belonging to Fudong Communication (Shenzhen) Group Co., Ltd. Fudong collaborates with global electronic component distributors and Chinese spot inventory suppliers.


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