The Yideng 503040 3.7V 600mAh Square rechargeable battery for Digital Thermometer is developed for portable devices that require stable, long-lasting, and safe energy performance. With a 3.7V rated voltage, 600mAh capacity, and compact 5.0 × 30.0 × 40.0mm square structure, this battery provides an efficient power solution for digital thermometers, handheld testing instruments, portable meters, and other electronic measurement equipment.
Compared with conventional battery solutions, the 503040 square rechargeable battery features a lightweight pouch-cell design, optimized energy density, and stable discharge characteristics. Its low self-discharge performance helps extend standby time, making it suitable for devices that require reliable operation during storage and intermittent use.
Based on Yideng's lithium battery manufacturing experience, the 503040 battery supports flexible OEM/ODM customization, including terminal design, wire configuration, PCM protection, capacity adjustment, and product labeling. From sample development to large-scale production, Yideng provides professional battery solutions for global equipment manufacturers.
| Item | Specification |
| Model | 503040 |
| Material | Li-ion Polymer Battery |
| Normal Capacity (0.2C) | 600mAh |
| Minimum Capacity (0.2C) | 600mAh |
| Energy | 2.22Wh |
| 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%) |
Digital thermometers and testing equipment require stable voltage to maintain accurate operation.
The 503040 3.7V 600mAh Square rechargeable battery for Digital Thermometer adopts a high-quality lithium polymer cell structure with optimized electrode materials, providing:
- Stable 3.7V voltage output
- Consistent discharge performance
- Reliable energy delivery during continuous operation
This design helps minimize power fluctuations that may affect device performance.
The square pouch battery design allows manufacturers to maximize internal device space while maintaining sufficient energy capacity.
Key design advantages:
- Compact 5.0 × 30.0 × 40.0mm dimensions
- Lightweight 12g structure
- Flexible installation options
- Suitable for portable electronic equipment
The flat battery structure makes it easier for engineers to integrate power solutions into slim instrument designs.
For medical testing equipment and portable measurement devices, battery safety and reliability are essential.
The 503040 battery incorporates multiple safety considerations:
- Controlled charging performance
- Over-discharge protection support
- Stable thermal performance
- Reliable cycle life performance
The battery supports international certifications including:
- CE
- UL1642
- UN38.3
Helping customers meet global product safety and transportation requirements.
503040 3.7V 600mAh Square rechargeable battery for Digital Thermometer uses high-quality raw materials, sufficient capacity, long endurance, safe and non-explosive, non-gassing, fully automated manufacturing process.
Nominal Voltage: 3.7V
Delivery Voltage: 3.85V ~ 4.05V
Nominal Capacity: 600mAh
Battery Cell Measurement: 5.1 × 30.1 × 40.5mm
1. 2,000+ custom battery models available — tailored in size, voltage, capacity, and terminal type.
2. Proprietary intelligent BMS — designed in-house for enhanced safety, balanced charging, and real-time protection.
3. Competitive pricing without compromising quality — guaranteed on-time delivery and stable annual output.
4. Full international approvals: CE, UL1642, CB, BIS, KC, ROHS, REACH, UN38.3, and IEC62133 compliant.
5. Partnered with global top-tier brands — 24/7 technical support and 1-year warranty included.
6. 25+ granted patents, 300+ certificates, and recognized as a national high-tech enterprise.
We hold official dangerous goods export qualifications. All shipments use thick UN-certified cartons, full-wrapped EVA foam and wooden pallets to eliminate collision and short-circuit risks. We offer FCL, LCL sea freight and air transport, and assist with full formal customs clearance for hazardous cargo.
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