Description
WLY104050 3.7V 2500mAh LiPo Battery – High-Capacity Micro Rechargeable Battery Pack for Wearables, Micro Drones & IoT
Introduction
The WLY104050 3.7V 2500mAh LiPo Battery is a premium micro rechargeable battery pack designed to provide stable and reliable power for a wide range of compact electronics. Its high energy density, stable voltage output, and lightweight construction make it ideal for wearables, micro drones, IoT devices, and embedded systems. With a robust design and open-wire integration, this battery ensures optimal performance while remaining easy to integrate into prototypes or production devices.
Technical Specifications of WLY104050 3.7V 2500mAh LiPo Battery
Model Number – WLY104050
The WLY104050 3.7V 2500mAh LiPo Battery is identified by its model number, which specifies its 104050 form factor, energy capacity, and manufacturing family. Using the exact model ensures proper compatibility with existing circuits, enclosures, and replacement batteries.
Nominal Voltage – 3.7V
The battery delivers a stable nominal voltage of 3.7V, making it suitable for devices requiring consistent 3.3V or 5V regulated systems. The cell can safely charge up to 4.2V and discharge down to 2.75–3.0V, ensuring predictable performance for sensitive electronics.
Nominal Capacity – 2500mAh
With a high-capacity 2500mAh rating, this LiPo battery offers extended runtime compared to standard micro cells. Devices can operate longer between charges, whether in wearables tracking fitness data, micro drones performing sustained flights, or IoT sensors transmitting data over long periods.
Continuous & Maximum Charge/Discharge
- Continuous Charge: 0.5C (~1250 mA)
- Maximum Charge: 1C (~2500 mA)
- Continuous Discharge: 0.5C (~1250 mA)
- Maximum Discharge: 1C (~2500 mA)
These specifications provide flexibility for both steady usage and short bursts of high power demand. This makes it ideal for drones executing sudden maneuvers or wearables with periodic high-current operations.
Connector Type – Open Wire
The open-wire connector allows for seamless integration with custom PCBs, JST connectors, or other systems. Engineers can solder directly or attach a protective PCM circuit, ensuring both versatility and safety.
Life Cycles – ≥300
The WLY104050 3.7V 2500mAh LiPo Battery is rated for ≥300 cycles at standard operating conditions, maintaining over 80% of its original capacity. Proper usage and charging habits can extend life cycles significantly.
Physical Dimensions & Weight
- Dimensions: 10 × 40 × 50mm (max including PCB: 10 × 40 × 52.5mm)
- Weight: 50g
Its compact and lightweight design ensures easy placement within slim enclosures without compromising structural integrity or performance.
Integration & Design Guidance of WLY104050 3.7V 2500mAh LiPo Battery
Mechanical Integration
The WLY104050 3.7V 2500mAh LiPo Battery features a flat, compact 104050 form factor, making it ideal for integration into tight enclosures such as wearables, micro drones, and IoT devices. When designing housings, engineers should allow 2–3 mm of clearance around the battery to accommodate insulation layers or protective circuitry without compressing the cell.
To prevent movement and vibration, which can compromise connector integrity or damage the battery, use non-conductive foam, plastic clips, or custom brackets to secure the battery. This is particularly critical for mobile applications like drones or portable electronics that experience repeated motion or shock. Proper mechanical stabilization helps maintain consistent electrical contact and ensures safety over repeated cycles.
Electrical Integration
For reliable and safe operation, the WLY104050 3.7V 2500mAh LiPo Battery should be paired with a Protection Circuit Module (PCM). This module safeguards against overcharge, overdischarge, and short circuits, which are the primary risks associated with LiPo cells.
Even if the battery includes internal protection, adding system-level monitoring of voltage, current, and state-of-charge (SoC) is strongly recommended. Such monitoring enables early detection of irregularities, supports accurate runtime estimation, and allows the device to respond to abnormal conditions—such as reducing load during high current draws or disconnecting the battery if a thermal limit is exceeded.
Flexible open-wire connectors allow designers to integrate the battery into custom PCB layouts, test rigs, or charging circuits. This versatility is particularly useful for prototyping, small-batch production, or embedded systems requiring precise form factor adaptation.
Thermal Considerations
The operational environment significantly impacts the longevity and performance of the WLY104050 3.7V 2500mAh LiPo Battery. Avoid placing the battery near high-heat components, such as brushless motors, MOSFETs, resistive loads, or tightly packed power electronics, as elevated temperatures accelerate chemical degradation and can reduce cycle life.
Designers should aim to maintain stable ambient temperatures around the battery. Thermal management strategies can include ventilation slots in enclosures, heat sinks for nearby components, or thermal insulation to protect the battery from nearby heat sources. These precautions ensure consistent voltage delivery, minimize internal resistance increases, and reduce the risk of thermal runaway.
System Power Budgeting
Accurate power budgeting is crucial when designing devices powered by the WLY104050 3.7V 2500mAh LiPo Battery. Runtime can be estimated using the formula:
Runtime (hours) ≈ Capacity (mAh) / Load (mA)
For example, a device drawing a steady 250 mA would achieve approximately 10 hours of operation from this 2500mAh battery. Designers should account for additional factors, including peak current bursts, regulator efficiency, and battery aging, which can slightly reduce actual runtime.
By carefully considering mechanical placement, electrical integration, thermal environment, and load profile, engineers can ensure optimal performance, longevity, and safety from the WLY104050 3.7V 2500mAh LiPo Battery across a wide range of applications.
Safe Handling, Charging & Storage of WLY104050 3.7V 2500mAh LiPo Battery
Charging Guidelines
The WLY104050 3.7V 2500mAh LiPo Battery requires careful charging to ensure safety, maximize cycle life, and maintain reliable performance. Always use a LiPo-specific charger with a CC/CV (constant current/constant voltage) profile, as standard chargers may not regulate voltage and current precisely, leading to overheating or capacity loss.
For routine charging, a 0.5C charge rate (~1250 mA) is recommended. This rate provides a balance between charge speed and battery longevity, reducing stress on the cells. In systems that are designed for robust thermal management and have been tested for stability, fast charging at 1C (~2500 mA) is possible, but care must be taken to monitor temperature and prevent overcurrent conditions. Never exceed the maximum cell voltage of 4.2V, as overvoltage can lead to swelling, reduced life, or even safety hazards.
In addition to current control, ensure that the open-wire connectors are correctly attached and that the battery is placed on a non-conductive, heat-resistant surface while charging. Avoid leaving the battery unattended during charging, particularly during fast charge cycles, to prevent thermal runaway risks.
Storage Recommendations
Proper storage is essential to maintain the WLY104050 3.7V 2500mAh LiPo Battery’s performance and lifespan. For long-term storage, the battery should be kept at 40–60% state-of-charge (SoC), which is considered the safe mid-range for LiPo chemistry. Storing fully charged or fully depleted batteries can accelerate capacity loss and shorten cycle life.
The storage environment should be cool, dry, and well-ventilated, ideally between 15–25°C. High temperatures can accelerate chemical reactions inside the battery, leading to swelling or permanent damage, while extremely low temperatures can reduce the battery’s ability to deliver current when reactivated. If storing multiple batteries together, ensure each is insulated and kept apart to prevent accidental short circuits.
Transport & Safety
When transporting the WLY104050 3.7V 2500mAh LiPo Battery, compliance with local and international lithium battery transport regulations is mandatory. Batteries should have insulated leads and be packaged securely in non-conductive, protective materials to prevent mechanical damage or short circuits.
For bulk shipments, ensure that batteries are separated by foam, plastic trays, or individual compartments to prevent contact. Mechanical shocks, drops, or exposure to heat during transit can compromise battery safety and performance. Always label packages according to transportation guidelines, specifying lithium battery contents, nominal voltage, and capacity.
Disposal & Recycling
The WLY104050 3.7V 2500mAh LiPo Battery contains recoverable materials that should not be discarded in household waste. Never throw LiPo batteries in regular trash, as damaged or punctured cells can ignite or leak hazardous substances.
Instead, use certified e-waste or lithium battery recycling channels. Many regions have dedicated collection points for electronic components or hazardous waste that handle proper chemical recovery and disposal. Prior to disposal, fully discharge the battery safely and insulate the terminals to prevent short circuits during handling.
Applications & Use Cases of WLY104050 3.7V 2500mAh LiPo Battery
Wearables
The WLY104050 3.7V 2500mAh LiPo Battery is ideal for wearable electronics, where space, weight, and stable power delivery are critical. Its compact 104050 form factor and lightweight design (~50g) allow integration into wristbands, smartwatches, fitness trackers, and other wearable devices without compromising comfort or ergonomics.
Powering Sensors & Displays – Modern wearables incorporate multiple components such as BLE radios, micro displays, optical heart-rate sensors, and inertial measurement units (IMUs). Each of these components demands a stable and reliable power supply to operate correctly. The 3.7V nominal output of the WLY104050 LiPo Battery ensures that all peripherals receive consistent voltage, enabling accurate sensor readings, smooth display performance, and reliable wireless communication.
Ergonomics – In wearable applications, the placement and weight of the battery significantly affect comfort. Thanks to its thin form factor, the WLY104050 3.7V 2500mAh LiPo Battery can be integrated into straps or bands without creating bulk. Its manageable weight (~50g) ensures the device remains wearable for extended periods without causing strain.
Battery Life Management – To maximize runtime, wearables should combine this high-capacity LiPo battery with optimized firmware strategies. Utilizing low-power modes, sleep intervals, and efficient sensor polling schedules reduces energy consumption and extends operational periods between charges. The high 2500mAh capacity further supports long-term usage without frequent recharges, enhancing user convenience.
Micro Drones
The WLY104050 3.7V 2500mAh LiPo Battery is also highly suitable for micro drone applications, where both weight and energy density are critical. Its design delivers a balance between sufficient capacity for extended flight and a lightweight profile to maintain maneuverability.
Flight Performance – Micro drones benefit from the battery’s capacity, which provides longer hover times and increased cruising endurance compared with smaller 1000–1500mAh cells. The stable voltage ensures motors and flight controllers operate reliably, minimizing sudden power drops that can affect flight stability.
Burst Power – The WLY104050 LiPo Battery can handle bursts up to 1C (~2.5A), allowing the drone to respond effectively to sudden thrust or maneuvering demands. While sustained high-current draw may require higher-C cells, for short-term bursts, this battery delivers sufficient power for agile flight and obstacle avoidance.
Mounting & Center of Gravity – For optimal drone performance, it is important to mount the battery near the drone’s center of mass. The flat form factor allows secure fastening without affecting balance, ensuring stable handling, minimal vibration, and reduced stress on the airframe.
IoT Devices
For IoT deployments, the WLY104050 3.7V 2500mAh LiPo Battery provides reliable energy for remote sensor nodes, environmental monitors, smart home devices, and industrial IoT applications.
Remote Sensor Nodes – Many IoT sensors are deployed in locations where regular maintenance is difficult. The battery’s high capacity enables devices to operate for weeks or months, depending on duty cycles and data transmission intervals.
Energy Buffering – The battery can act as an energy buffer when paired with intermittent power sources such as solar panels or energy harvesting modules. During periods when external energy is insufficient, the LiPo battery maintains uninterrupted operation, making the system more robust and maintenance-free.
Duty Cycle Optimization – To further enhance longevity, firmware and device design should implement deep sleep modes, event-driven triggers, and optimized communication intervals. By combining these strategies with the WLY104050 3.7V LiPo Battery’s high-capacity output, IoT devices can achieve reliable, long-term deployment without frequent intervention.
DIY & Embedded Systems
For makers, hobbyists, and embedded systems engineers, the WLY104050 3.7V 2500mAh LiPo Battery offers a flexible and dependable power source for prototypes and small-scale electronics projects.
Prototyping – Compatible with Arduino, ESP32, Raspberry Pi Lite boards, and other low-power embedded platforms, this battery delivers sufficient capacity to power sensors, actuators, and microcontrollers during testing and field deployment. Its open-wire connector design facilitates easy connection to custom PCBs, breadboards, or protection circuits.
Safety Practices – While designing and testing DIY electronics, it is crucial to use PCM-protected charging circuits and LiPo-safe bags. The WLY104050 LiPo Battery can provide reliable power safely when standard handling practices are observed, including avoiding short circuits, overcharging, or deep discharge conditions. Proper mechanical securing and thermal considerations further reduce the risk of damage or accidents during experimentation.
In summary, the WLY104050 3.7V 2500mAh LiPo Battery is a versatile, high-capacity energy solution suitable for wearables, micro drones, IoT devices, and DIY embedded systems. Its combination of compact size, lightweight design, stable 3.7V output, and flexible integration options makes it ideal for applications where reliable, long-lasting, and safe power delivery is essential.
Comparative Analysis of WLY104050 3.7V 2500mAh LiPo Battery
Advantages over Smaller Cells
The WLY104050 3.7V 2500mAh LiPo Battery significantly outperforms smaller 1000–1500mAh micro LiPo batteries in terms of runtime and operational stability. Devices powered by smaller cells often require frequent recharging, which can interrupt workflow, reduce convenience, and potentially shorten the lifespan of the battery due to repeated deep discharge cycles. In contrast, the 2500mAh capacity of the WLY104050 3.7V LiPo Battery provides extended energy delivery, allowing wearables, micro drones, and IoT devices to operate continuously for longer periods without user intervention.
This higher capacity is particularly advantageous in applications where consistent and uninterrupted power is crucial. For instance, micro drones can achieve longer flight times without the need to swap batteries mid-session, and IoT sensors deployed in remote or difficult-to-access locations can maintain operation for days or weeks depending on duty cycle. The reduced number of charge cycles also contributes to long-term battery health, as fewer deep discharges decrease stress on the cell chemistry, maintaining its efficiency over hundreds of cycles.
Advantages over Larger/High-C Cells
While higher-capacity LiPo batteries exist, such as 3000–5000mAh cells, they typically come with increased weight, thickness, and bulk, which makes integration into compact or lightweight designs challenging. The WLY104050 3.7V 2500mAh LiPo Battery strikes an ideal balance between capacity and form factor. Its 104050 dimensions (10 × 40 × 50mm) and light weight (~50g) make it suitable for space-constrained applications, including wearable electronics, micro drones, and portable IoT nodes, without compromising ergonomics or performance.
In drones, for example, larger high-capacity cells may extend flight time but increase the total mass, reducing agility and efficiency. For wearables, bulky batteries can impact comfort and usability. The WLY104050 3.7V 2500mAh LiPo Battery offers sufficient energy for extended operation while keeping the device lightweight and user-friendly. Additionally, its open-wire connector design enables flexible integration with custom circuits and protection modules, further enhancing its adaptability across diverse electronic applications.
Practical Implications
- Longer Runtime with Moderate Size: The battery delivers high energy density in a compact form, allowing devices to function longer without compromising size constraints.
- Reduced Maintenance: Fewer charging cycles and lower stress on the cell improve overall longevity.
- Design Flexibility: Lightweight and slim form factor facilitates ergonomic designs in wearables and drones.
- Energy Efficiency: Supports moderate bursts of current up to 1C, making it versatile for applications with transient high-power demands.
In summary, the WLY104050 3.7V 2500mAh LiPo Battery bridges the gap between smaller microcells and larger high-capacity cells, providing a balanced solution that optimizes runtime, safety, and design integration for a wide range of electronics, wearables, drones, and IoT applications.
Troubleshooting & Diagnostics of WLY104050 3.7V 2500mAh LiPo Battery
Rapid Voltage Drop
A sudden voltage drop in the WLY104050 3.7V 2500mAh LiPo Battery is a common issue that can affect device performance. This is usually caused by excessive load, high current draw beyond the battery’s rated 0.5C continuous discharge, aging cells, or extreme temperatures. Rapid voltage drops can cause microcontrollers to reset, sensors to malfunction, or drones to lose thrust unexpectedly.
Solutions & Prevention:
- Check the load profile of your system and ensure that peak currents do not exceed the battery’s 1C maximum discharge rating (~2500 mA).
- Allow the battery to rest and stabilize if it has been recently discharged heavily.
- Implement current-limiting circuits or soft-start mechanisms in your electronics to prevent sudden spikes.
- Monitor voltage using a system-level battery management circuit to detect early signs of stress.
Battery Swelling
Swelling occurs when the LiPo cells in the WLY104050 3.7V 2500mAh LiPo Battery are exposed to overcharging, overdischarging, or prolonged high-temperature environments. Swollen batteries are a safety hazard as they may leak electrolyte or, in extreme cases, catch fire.
Detection & Handling:
- Regularly inspect the battery for physical deformation or bulging.
- Stop using any battery showing signs of swelling immediately.
- Safely dispose of the battery through certified recycling channels—never puncture or throw in household trash.
- Avoid storing fully charged batteries for extended periods, and maintain storage charge around 40–60%.
Preventive Measures:
- Use a protection circuit module (PCM) to prevent overcharge/overdischarge conditions.
- Keep batteries away from direct heat sources like motors, power MOSFETs, or sunlight.
- Follow manufacturer-recommended charging rates (0.5C standard, 1C max if tested).
Reduced Runtime
If the WLY104050 3.7V 2500mAh LiPo Battery delivers less runtime than expected, it may indicate capacity degradation, aging, or inefficiencies in the system. Reduced runtime can manifest in wearables shutting down earlier, drones having shorter flight times, or IoT nodes failing to maintain scheduled transmissions.
Troubleshooting Steps:
- Measure the battery voltage under load to verify capacity.
- Check for firmware inefficiencies such as high duty cycles, frequent wakeups, or unoptimized sensor polling.
- Inspect the device for excessive current draws or short circuits.
Maintenance & Solutions:
- Recalibrate the battery management system (BMS) to ensure accurate state-of-charge (SoC) readings.
- Optimize firmware for low-power modes and event-driven operations.
- Replace batteries that have passed their rated ≥300 cycles or show persistent voltage drop signs.
Charging Issues
Charging problems can prevent the WLY104050 3.7V 2500mAh LiPo Battery from reaching full capacity or may trigger safety protections. Common causes include faulty chargers, open-wire connections, or incorrectly installed PCM circuits.
Symptoms & Solutions:
- If the battery fails to charge fully, verify the charger output voltage (should be 4.2V per cell) and current settings (0.5C standard, 1C max).
- Inspect open-wire connectors for loose solder joints or frayed wires that may cause intermittent connections.
- Confirm that PCM/protection circuits are functioning correctly—these can prevent charging if abnormal conditions are detected.
- Avoid using generic chargers not designed for LiPo cells, as they may overcharge or undercharge the battery.
Preventive Measures:
- Always use a LiPo-specific charger and monitor the charging process.
- Store batteries at moderate charge levels when not in use to reduce stress.
- Periodically check wiring integrity and insulation in high-vibration applications like drones.
Conclusion
The WLY104050 3.7V 2500mAh LiPo Battery is a versatile, high-capacity, and reliable power source for wearables, micro drones, IoT devices, and embedded systems. Its compact 104050 form factor, stable voltage output, and rechargeable design make it ideal for modern electronics requiring long-lasting, consistent, and safe energy delivery. By combining proper integration, charging, and handling practices, users can maximize performance and cycle life, ensuring this LiPo battery serves as a dependable foundation for a wide range of applications.
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