The 401020 3.7v 500mAh Lithium polymer battery combines high capacity with a slim pouch structure, providing an efficient power solution for compact electronic products that need longer working time.
Compared with smaller miniature lithium batteries, this model offers increased energy storage while maintaining a lightweight and space-saving design. The flexible pouch format allows manufacturers to optimize internal layouts and integrate the battery into different product structures.
The battery maintains stable voltage output during operation and supports reliable charging and discharging performance for daily-use electronic devices. Each production batch is tested for key electrical parameters including capacity consistency, voltage performance and safety characteristics to ensure dependable quality.
Yideng supplies standard battery models as well as application-oriented solutions. According to customer requirements, additional processing options such as PCM integration, wire assembly, connector matching and customized battery configurations are available for different electronic product designs.
| Item | Specification |
| Model | 401020 |
| Material | Li-ion Polymer Battery |
| Normal Capacity (0.2C) | 500mAh |
| Minimum Capacity (0.2C) | 500mAh |
| Energy | 1.85Wh |
| Normal Voltage | 3.7V |
| Delivery Voltage | 3.85V ~ 4.05V |
| Standard Charge Method | Charge at maximum current. When the battery or pack terminal voltage reaches the charging limit voltage, charge at constant voltage until the charging current is less than or equal to 0.02 C, then stop charging. |
| Discharge Program | The battery or the battery pack carries on the constant current discharge with the maximum discharge current to the discharge termination voltage. |
| Max Charging Current | 1C CC/CV → 0.02C cutoff |
| Max Discharging Current | 1C CC/CV → 3.0V cutoff |
| Over-Discharging Current | 3.0V |
| Operation Temperature Range |
Charging: 0°C ~ 50°C Discharging: -20°C ~ 60°C |
| Allowable Maximum Surface Temperature |
Charging: Tmax ≤ 50°C Discharging: Tmax ≤ 60°C |
| Storage T/H Range (time) |
-20°C ~ 60°C (Less than 1 month) -20°C ~ 45°C (Less than 3 months) -20°C ~ 25°C (Less than 1 year) |
| Cycle Life |
≥ 300 times (Thickness expansion rate ≤ 10%) ≥ 500 times (Thickness expansion rate ≤ 12%) |
The 401020 3.7v 500mAh Lithium polymer battery provides 500mAh capacity in a compact pouch format, helping manufacturers achieve longer device runtime without significantly increasing product size or weight. It is suitable for applications where both battery endurance and compact design are important.
Designed for rechargeable electronic devices, this battery delivers consistent voltage output during operation. Stable discharge characteristics help maintain reliable performance for products requiring continuous power supply, such as trackers, sensors and wearable equipment.
The soft pouch structure provides greater design flexibility compared with rigid battery formats. Engineers can arrange the battery more efficiently inside compact devices, while customized options are available for:
- PCM protection solutions
- Wire length
- Connector types
- Terminal configuration
This roadmap outlines the evolving technical trends of battery base materials from 2022 to 2025. Separator, foils, packaging film and other components keep pursuing thinner thickness with optimized coating solutions, enabling higher energy density and improved cell safety.
Most competitors have the same stuff — production lines, certs, capacity. But what really sets us apart? A few real things.
We've got our own R&D team. Not a few names on a brochure. These guys actually work in the lab every day — tweaking electrolyte, testing separators, running cycle data. Not copying formulas — improving them. 30+ patents came out of that grind.
Production is fully automated. Not semi-auto with workers filling gaps. From cell 1 to 50,000 — consistent. The cleanroom? Genuine Class 100,000 standard. For lithium batteries, dust control is a safety issue.
And our K-value testing — every single cell goes through it. Measures internal resistance and voltage drift. Faulty ones get pulled right there. Never shipped.
We've been doing this 12 years. Not a startup. Not a label sticker. Design, manufacture, test — all in-house.
Bottom line: clients don't gamble with us. Every cell we make — from drawing to delivery — is under our control. That's why they come back.
A1: Of course. please send us your specific requirement, it includes Size, PCM, Wires and Connectors.
A2: About 3 ~ 7 days for samples, 10 ~ 25 days for bulk order.
A3: No MOQ for existent items, MOQ 1000pcs for modified ones.
A4: For small quantity, generally ship by DHL, EMS, UPS, or FedEx, usually take 4 ~ 7 days to arrive. For large quantity, ship by airplane or ocean, shipping time will depend on destination port.
A5: Of course, all our products are with One Year Warranty.
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