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Engineered to deliver uncompromising energy reliability, this 3.7V 5000mAh 26650 cylindrical lithium-ion rechargeable battery serves as the optimal power core for advanced story-telling devices, interactive audio equipment, energy storage systems, and various high-drain electronics. Upon handling the battery cell, one immediately notices the solid, meticulously balanced cylindrical form factor, tightly wrapped in a thermally resilient industrial sleeve that ensures structural integrity during continuous operation. The cell boasts a substantial nominal capacity of up to 5000mAh and maintains a steady nominal voltage of 3.7V. It utilizes advanced lithium-ion cell technology combined with rigorous manufacturing processes to ensure excellent energy density and flawlessly stable output performance across diverse operational environments.
To enhance operational safety and streamline assembly line integration, the product comes standard with an industrial-grade integrated protection circuit board (PCB). This intelligent BMS system effectively provides comprehensive overcharge, over-discharge, short-circuit, and overcurrent protection, completely eliminating safety hazards for end-user devices. Additionally, the battery is pre-wired with premium output leads and equipped with common terminals. Specific terminal models can be fully customized to your exact specifications, including XT60, Anderson connectors, or spade terminals. This plug-and-play adaptability allows procurement teams and engineers to quickly integrate the power source into various applications right out of the box, greatly simplifying the installation and connection process while reducing labor costs.
Ultra-high capacity and energy density: Utilizing highly refined battery cell materials, a massive capacity of 5000mAh is achieved within the standard 26650 footprint. This translates to significantly longer operating times for story-telling devices and more powerful energy output for demanding mechanical applications.
Intelligent BMS safety protections: A built-in, high-precision industrial protection board monitors the battery's status in real time. It effectively prevents hazards caused by electrical misuse, providing multiple layers of defense against thermal and electrical stress to ensure absolute safety.
Ready to use, convenient and efficient: Delivered with pre-attached silicone wires and customized terminals, this unit eliminates the hassle and potential thermal risks of self-soldering. It seamlessly adapts to existing assembly workflows, drastically shortening project assembly time.
Stable and reliable output performance: Engineered for continuous high-rate discharge, it features a remarkably low self-discharge rate and an extended cycle life (typical cycle life ≥500 cycles at room temperature), guaranteeing a stable voltage curve even under strenuous operating conditions.
Strict quality control and testing standards: Each batch undergoes rigorous factory evaluations, including drop tests, extreme temperature cycling, and capacity retention checks, ensuring that large-volume deployments maintain absolute consistency and reliability.
Global compliance and durability: Designed with environmental responsibility in mind, the cell strictly complies with UL, CE, RoHS, and other international safety and environmental directives. It features no memory effect, allowing for flexible charging schedules while ensuring barrier-free global market access.
Model: | 26650 Cylindrical Lithium Battery |
Nominal Capacity: | 5000mAh (Tested with 0.2C discharge standard) |
Nominal Voltage: | 3.7V |
Charging Voltage: | 4.2V ± 0.05V |
Discharge Cut-off Voltage: | 2.5V (Protection board activated) |
Standard Charging Current: | 2500mA (0.5C) |
Maximum Charging Current: | 5000mA (1C) |
Standard Discharge Current: | 5000mA (1C) |
Maximum Continuous Discharge Current: | 10000mA (2C) (Subject to protection board specifications, please confirm) |
Internal Resistance: | ≤ 30mΩ |
Cycle Life: | ≥500 cycles (At room temperature, 0.5C charge/discharge, capacity retention rate > 80%) |
Operating Temperature: | Charging: 0°C ~ +45°C / Discharging: -20°C ~ +60°C |
| Storage Temperature: | -20°C ~ +45°C (Recommended long-term storage voltage 3.7V-3.9V) |
| Protection Functions： | Overcharge, over-discharge, overcurrent, short circuit protection |
| Wire Specifications: | Standard silicone wire (Length and wire gauge can be customized, e.g., 12AWG) |
| Terminal Type: | Standard common male and female terminals (e.g., XT60), customization supported |
| Dimensions (approx.): | Diameter 26.5mm, Height 65.5mm (excluding terminals and wire length) |
| Weight (approx.): | 95g (excluding wires) |
This product, distinguished by its large capacity, high continuous power delivery, and exceptionally stable performance, is purposefully engineered to drive innovation across multiple demanding sectors. It serves as an incredibly versatile power foundation for the following fields:
Digital and Audio Appliances: Serves as the primary energy source for interactive story-telling devices, portable vacuum cleaners, drones, and model aircraft. The consistent voltage output ensures clear audio playback and uninterrupted motor function.
Energy Storage Systems: Highly effective for solar energy storage batteries, UPS backup power supplies, outdoor mobile power stations, and residential home energy storage units requiring dependable long-term cycling.
Professional Power Tools: Perfectly matched for the high-drain requirements of high-power drills, angle grinders, electric saws, and heavy-duty garden tools, delivering sustained torque without premature voltage drops.
Electric Transportation: An excellent building block for assembling robust battery packs utilized in electric bicycles, scooters, balance bikes, and various portable mobility devices that demand reliable acceleration.
High-Intensity Lighting Equipment: Provides enduring illumination power for high-brightness LED flashlights, professional headlamps, critical emergency lights, and long-range searchlights.
Industrial and Medical Equipment: Functions flawlessly as a backup or main power supply for sensitive measurement instruments, security monitoring equipment, and essential medical devices where power failure is not an option.
Please strictly use a dedicated lithium-ion battery charger and ensure that the charging parameters (specifically the 4.2V cutoff voltage) perfectly match the cell's specifications. Using a lead-acid battery charger or any charger with incompatible voltage/current parameters is strictly prohibited and may cause irreversible damage to the cell chemistry.
Do not disassemble, puncture, mechanically impact, throw into fire, or immerse the battery in water or any other liquids. Do not short-circuit the positive and negative terminals of the battery under any circumstances. Do not charge the battery at excessively high temperatures (>45°C) or freezing conditions (<0°C). Furthermore, do not store the battery loosely with metal objects (such as coins, keys, or hardware) to prevent accidental short circuits.
Do not exceed the maximum continuous discharge current specified for the product during continuous operational use. For large-scale inventory management and long-term storage (more than 1 month), implement strict warehouse temperature control. Charge the battery to a 50%-60% state of charge (approximately 3.7V-3.9V) and store it in a cool, dry environment with managed humidity. This professional hibernation protocol effectively lowers the self-discharge rate and preserves the internal chemistry. When integrating battery packs in series or parallel configurations on assembly lines, professional cell matching (ensuring identical voltage, capacity, and internal resistance) alongside the addition of a dedicated balancing protection board are strongly recommended.
After the battery reaches the end of its operational lifespan, please recycle it responsibly according to local environmental regulations and compliance directives. Do not dispose of it indiscriminately in standard waste streams.
A1: Typically, the overcharge protection voltage of the integrated protection board is precisely calibrated at 4.25V-4.35V±0.05V, the over-discharge protection voltage is set at 2.3V-2.5V±0.05V, and the overcurrent protection value depends on the specific board design requested (e.g., 15A-20A). Our dedicated technical support team is available to provide comprehensive troubleshooting guides and precise parameter matching to resolve any integration challenges.
A2: Each individual battery features a built-in protection board and can be utilized directly in parallel to multiply the total capacity. However, if your application requires them to be used in series to increase the overall voltage, there is a distinct risk of protection malfunction because individual protection boards cannot synchronize their cut-offs. For multi-series applications (such as 12V or 24V specialized battery packs), we strongly recommend utilizing a centralized Battery Management System (BMS) specifically designed for series connections with active balancing functions, or procuring our custom-engineered finished battery packs.
A3: Yes, absolutely. We fully support the deep customization of different wire lengths, wire gauges (such as utilizing thicker 10AWG silicone wires to safely carry larger continuous currents), and various common terminal interfaces (such as XT30, XT90, Anderson connectors, bullet connectors, etc.). This ensures a seamless, plug-and-play fit for your specific assembly requirements. Please specify your exact technical requirements during the initial consultation.
A4: Cycle life refers to the total number of complete charge and discharge cycles the battery can undergo under strict, standardized laboratory test conditions (such as a 25°C room temperature environment, charging and discharging at a consistent 0.5C current) before its maximum capacity naturally decays to 80% of its original nominal capacity. While our cells are rated for ≥500 cycles under these conditions, the actual service life in the field will be influenced by specific usage habits, environmental temperature fluctuations, and the depth of discharge.
A5: No. Modern advanced lithium-ion batteries are shipped with a partial maintenance charge directly from the factory and inherently possess no memory effect. For the very first use, simply charge the unit fully using a suitable, parameter-matched charger until the indicator shows full. The outdated practice of an activation long charging period is entirely ineffective for modern lithium chemistry and is potentially harmful to the battery's longevity.
