3.7V AAA 10440 350mAh Lithium Ion Battery Cell
3.7V 10440 350mAh Lithium Ion Battery | Compact, Reliable Power for Small Devices
The 3.7V AAA 10440 350mAh Lithium Ion Battery Cell is a compact yet high-performance rechargeable battery designed for space-limited devices that demand stable, long-lasting energy. With high cycle life (80% capacity retention after 500 cycles) and 1C charge/discharge capability, this battery combines durability, efficiency, and flexibility. The AAA-sized Li-ion cell is ideal for flashlights, medical devices, smart electronics, and portable tools. Full OEM customization is available, including capacity, voltage, labeling, packaging, and terminals.
10440 Li Ion Battery Specification
Model: 10440 Lithium Ion Battery
Rated Capacity: 350mAh
Energy: 1.295Wh
Energy Density: 143.9Wh/kg
Minimal Capacity: 330mAh
Rated voltage: 3.7V
Discharge Cut-off Voltage: 2.75V
Charge Cut-off Voltage: 4.2V
Cycle Life: More than 500 cycles
Dimensions: Φ10*44mm
Weight: 9g
Internal Resistance: Less than 80mΩ
Standard Discharge Current: 0.2C (70mA)
Standard Charge Current: 0.2C (70mA)
Max Continuous Discharge Rate: 1C (350mA)
Max Continuous Charge Current: 1C (350mA)
Charging Temperature: 0 to 45℃;
Discharge Temperature: -20 to 65℃
Storage Temperature:
- -20℃~25℃: 12 months
- -20℃~45℃: 3 months
- -20℃~60 ℃: 1 month
Key Features — Lithium Ion 10440
Compact Power in AAA Size
The 10440 Li-ion cell shares the same dimensions as a standard AAA battery (10×44mm) but delivers 3.7V and 350mAh of energy — significantly higher than alkaline or NiMH cells of the same size. This makes it the perfect power solution for miniaturized electronics requiring strong, consistent voltage.
Long Cycle Life and Reliability
Built with premium-grade lithium-ion chemistry, this cell maintains over 80% capacity after 500 full charge–discharge cycles. The extended lifespan ensures fewer replacements and lower maintenance costs, offering sustainable performance for years.
1C Continuous Charge and Discharge Capability
Supporting 1C continuous charge and discharge rates, the 3.7V 10440 Li-ion battery ensures stable current flow and optimal performance in both high and low-power devices. Whether powering LED flashlights, miniature sensors, or wireless headsets, this cell provides reliable energy without overheating or voltage drops.
High Efficiency and Stable Output
Engineered with low internal resistance, this battery minimizes heat generation and maintains consistent power output across a wide operating range. The result is smooth, stable performance even under demanding electrical loads.
Customization Options (OEM & ODM)
We provide custom battery solutions tailored to specific device and branding requirements:
Custom capacity, voltage, and cycle life options
OEM branding: laser engraving, labels, sleeves, or logos
Adjustable dimensions and packaging for device fit
Terminal and connector options for easy integration
Available with protection circuit modules (PCM/BMS) for enhanced safety
This flexibility makes the 10440 cell ideal for manufacturers seeking a compact yet customizable energy solution.
What to Consider Before Buying 10440 Li-ion Batteries
When purchasing 3.7V 10440 Li-ion cells, keep the following points in mind:
Voltage Compatibility: Ensure your device supports 3.7V nominal voltage, as this is higher than standard AAA (1.5V).
Safety Features: Choose batteries with PCM/BMS protection if used in sensitive electronics.
Charger Compatibility: Use only Li-ion compatible chargers to prevent overcharge or damage.
Quality Certification: Always look for batteries that meet CE, UL, and UN38.3 safety standards.
Cycle Life & Performance Needs: Select high-quality cells offering ≥500 cycles for better longevity.
Customization: For OEM projects, request custom labeling, capacity, or terminals to match your design.
Typical Applications
🔹 Mini flashlights & headlamps
🔹 Smart medical devices
🔹 IoT & sensor modules
🔹 Laser pointers & e-tools
🔹 Wireless communication devices
🔹 Prototyping and compact electronics
Frequently Asked Questions (FAQ)
Can the 10440 Li-ion battery replace a standard AAA battery?
Only if your device supports 3.7V lithium-ion voltage. It cannot replace 1.5V alkaline or 1.2V NiMH batteries in standard electronics.
How long does the 10440 Li-ion cell last?
It retains 80% capacity after 500 cycles, depending on usage conditions and charge rate.
Does this battery require a protection circuit?
For sensitive or high-drain devices, it’s recommended to use PCM-protected versions to prevent overcharge, over-discharge, or short-circuit.
What charger should I use?
Always use a 3.7V Li-ion compatible charger with automatic cutoff to ensure safety and optimal cycle life.
Can I customize this battery for my product?
Yes. We offer OEM/ODM customization including voltage, capacity, label design, packaging, and terminal configuration.
Related Battery
