Power your next healthcare innovation with the high-performance 3.7V 500mAh 751540 Lithium Polymer Battery for Wearable Medical Devices. Formulated with a premium blend of Ternary material and LiCoO2, this flat, prismatic-type cell is engineered to reliably drive medical patches, patient monitors, portable ECG devices, wireless earbuds, and over-ear Bluetooth headsets. Its low self-discharge architecture ensures that the battery safely holds its charge for months on the shelf, while our strict factory logging system guarantees absolute batch-to-batch voltage consistency. With advanced built-in safety features protecting against over-current and short circuits, this hot-selling cell provides the standard-safety qualification demanded by modern medical and consumer markets.
Operating from real manufacturing facilities in the provinces of Hunan and Guangdong, we warmly welcome comprehensive OEM/ODM configurations. Our expert engineering team has successfully delivered over 180 customized battery projects, including 40+ specialized medical variants with bespoke protection circuit modules (PCM) and custom leads. Whether you need a single piece for engineering evaluation or a bulk wholesale container, our factory-direct network offers unmatched cost efficiency and flawless logistical clearance. Partner with a trusted China supplier today to elevate your hardware design.
Nominal Voltage: 3.7V
Delivery Voltage: 3.85V ~ 4.05V
Nominal Capacity: 500mAh
Measurement: 7.5 × 15 × 40.5mm
| Item | Specification |
| Model | 751540 |
| 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%) |
Superior Cycle Stability & Long Life: Formulated with premium Li-ion chemistry, this 3.7V 500mAh 751540 cell delivers an extended operational lifespan, ensuring consistent power output throughout hundreds of continuous charge-discharge cycles without significant degradation.
Medical-Grade Overcharge Tolerance: Engineered with robust thermal and chemical resilience, the battery exhibits exceptional overcharge tolerance, minimizing safety risks and preventing swelling during prolonged charging states.
Moisture-Resistant Hermetic Sealing: Designed to withstand challenging environments, the specialized pouch packaging provides superior moisture resistance, protecting internal active materials from humidity to guarantee reliability in wearable applications and patient patches.
Stable Prismatic Performance: The precisely balanced internal architecture maintains rock-solid voltage consistency under variable electronic loads, making it the ultimate safe power source for critical healthcare diagnostics and portable monitoring hardware.
This premium 3.7V 500mAh 751540 lithium polymer battery is engineered with a versatile form factor and high energy density, making it the ultimate power source across multiple fast-growing sectors:
Healthcare & Medical Wearables: Smart medical patches, continuous patient monitors, and portable ECG devices.
Smart Consumer Electronics: Premium TWS wireless earphones, over-ear Bluetooth headsets, and smart wearables.
Automotive & Telematics: Compact vehicle trackers, fleet management hardware, and portable GPS navigators.
Personal Care & Smart Appliances: High-end cordless hair straighteners, grooming tools, and beauty electronics.
General 3C Digital Devices: Mini action cameras, smart home controllers, and handheld digital gadgets.
The Challenge: Modern medical patches and wireless earbuds demand smaller footprints but higher capacities, often forcing engineers to sacrifice runtime.
Our Solution: With precise 7.5 × 15 × 40.5mm max dimensions, our 751540 cell packs a powerful 500mAh capacity into an ultra-slim, flat prismatic body, unlocking extra design freedom for ergonomic, close-to-skin hardware.
The Challenge: Vehicle trackers sealed in hot dashboards and cordless hair straighteners operating near heating elements subject batteries to high temperatures and humidity, leading to swelling or capacity drops.
Our Solution: Utilizing an advanced gel electrolyte alongside premium LiCoO2 and Ternary materials, this battery boasts superior thermal stability and moisture resistance. It prevents gas generation and maintains safe, stable output even in harsh, enclosed environments.
The Challenge: Devices like portable GPS navigators or seasonal digital gadgets often sit on warehouse shelves or in glove boxes for months, resulting in dead batteries due to high self-discharge and poor cycle life.
Our Solution: Our low self-discharge architecture ensures the cell holds its charge for months on the shelf. Combined with superior cycle stability (retaining 80% capacity after 500 cycles), it drastically extends the end-product's operational lifespan and reduces warranty return rates.
The Challenge: Strict global lithium battery shipping regulations and varying customs safety standards frequently cause shipment delays or import rejections.
Our Solution: Yideng eliminates procurement risks by providing an audit-ready supply chain with full certifications in hand (UL1642, BIS, CE, CB, IEC62133, RoHS, and UN38.3), ensuring flawless customs clearance and market entry in the US, Europe, and Asia.
Integrity is the absolute foundation of our steady global growth. At Yideng, we operate an open-door policy for international buyers, sourcing agencies, and premier third-party inspection firms such as SGS or TÜV. Our digital MES system, online testing checkpoints, and independent quality centers are continuously audit-ready. We provide total manufacturing transparency, inviting you to audit our dual-base production lines via on-site visits or real-time remote video inspections to verify our capabilities firsthand.
A1: Yes, we have professional R&D labs and a dedicated quality control center.
A2: Our batteries suit headphones, GPS, beauty tools, toys and all consumer electronics.
A3: PayPal is available for sample and small trial orders.
A4: All batteries use shockproof cartons and anti-static inner packaging.
A5: English specification manuals are attached with all bulk shipments.
Address
Xin'an Village industrial Park, Yonglejiang Town, AnrenCounty, Chenzhou City, Hunan Province, China
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