Modern medical and digital devices require batteries that balance size, capacity and reliability. The 703040 3.7V 820mAh tiny prismatic battery is developed as a compact prismatic cell solution for applications where stable power and efficient space utilization are essential.
With a cell dimension of 7.1 × 30.1 × 40.3mm and a weight of approximately 15g, this rechargeable battery provides higher energy capacity while maintaining a slim structure, making it suitable for portable monitoring equipment, handheld devices and intelligent electronics.
Yideng combines advanced lithium polymer technology with automated manufacturing capability to support both standard battery supply and customized battery development projects.
| Item | Specification |
| Model | 703040 |
| Material | Li-ion Polymer Battery |
| Normal Capacity (0.2C) | 820mAh |
| Minimum Capacity (0.2C) | 820mAh |
| Energy | 3.034Wh |
| 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 | 2.3V |
| 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%) |
Compared with smaller micro batteries, the 703040 model provides a larger 820mAh capacity, making it suitable for devices requiring longer operating time.
Its advantages include:
- Stable 3.7V voltage output
- High energy density design
- Low internal resistance
- Reduced heat generation
- Long cycle performance
This makes the battery suitable for portable devices that require continuous and reliable power support.
Battery stability is critical for healthcare equipment and professional electronic devices.
The 703040 prismatic battery adopts optimized separator technology and strict safety testing procedures to improve:
- Battery safety performance
- Charging stability
- Thermal reliability
- Long-term operation consistency
It helps manufacturers develop safer and more reliable portable products.
The 703040 3.7V 820mAh tiny prismatic battery is designed for portable equipment requiring reliable energy supply and compact installation.
In medical devices, it can support portable monitoring equipment and healthcare electronics where safety, consistency and long operating time are important factors.
For 3C digital products, the battery provides flexible power solutions for handheld scanners, e-readers and other smart portable devices requiring lightweight design and customized battery integration.
With OEM capability, Yideng works with customers to develop battery solutions according to product structure, power requirements and usage environment.
1. OEM ODM service is yes. (PACK with PCM & Wires & Connector)
2. Orders up to 1000pcs, the sample fee can be refunded.
1. All products will be tested 100% before shipment to ensure that the product does not have any quality problems.
2. We guarantee that within 12 months from the date of receipt of the goods, we will not include man-made damage. If there is any quality problem, we will provide return service.
Choose Hunan Yideng and be your reliable supplier in China
1. Product guarantee: original authentic (support sample inspection)
2. Product inventory: reliable and complete (first-level distributors)
3. Timeliness: product quotation and delivery (quotation within 1 hour and delivery within 3 days)
4. Service: one-stop professional assembly and quotation of BOM list
5. PCB and PCBA one-stop OEM service
A1: The 703040 battery combines compact dimensions with 820mAh capacity, stable voltage output and reliable safety performance, making it suitable for portable medical equipment and 3C electronic devices requiring consistent power.
A2: Yes. Yideng provides OEM/ODM services including customized PCM, wires, connectors, labels, voltage settings and battery specifications based on customer product designs.
A3: The battery can meet international safety requirements including CE, UL1642, UN38.3, IEC62133 and RoHS standards for global shipment and product applications.
A4: Yideng applies strict quality control throughout manufacturing, including raw material inspection, production monitoring, performance testing and final inspection to ensure consistent battery reliability.
A5: Yes. Yideng provides sample testing support, and for qualified bulk orders, sample costs may be refunded according to order conditions.
A6: Yideng has intelligent manufacturing facilities with high automation levels and large-scale production capability, supporting both customized battery development and stable mass production for global customers.
Yideng delivers customized lithium polymer battery solutions for medical devices, 3C electronics and portable applications with professional engineering support and stable manufacturing capability.
Contact Yideng today for battery samples, OEM solutions and competitive factory quotations.
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中国湖南省郴州市安仁県永楽江鎮新安村工業団地
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