3.7 V 4000mAh Lithium Ion Battery 805080

Part 1. 4000 mAh Battery meaning

A 4000 mAh (milliamp-hour) battery represents its capacity to deliver 4000 milliamps of current for one hour. In practical terms, this means it can power a device consuming 1000 milliamps for approximately four hours. The higher the mAh rating, the longer the battery can operate, making it suitable for energy-demanding applications like drones, tablets, and medical devices.

Part 2. Chemistry, components, and principle of 3.7 V 4000mAh li-ion battery

The 3.7V 4000mAh lithium-ion battery from Ufine Battery uses lithium polymer (LiPo) chemistry. LiPo batteries are known for their lightweight design, high energy density, and flexibility in shape, which makes them ideal for compact devices.

Components and Structure:

Cathode: Lithium cobalt oxide (LiCoO₂) or a similar material.

Anode: Graphite.

Electrolyte: Lithium salts dissolved in an organic solvent.

Separator: A porous membrane to prevent short circuits.

Encasing: A protective aluminum pouch to safeguard internal components.

Principle:

This battery operates based on the movement of lithium ions between the anode and cathode during charge and discharge cycles. When charging, ions move to the anode; during discharge, they travel back to the cathode, generating energy.

Part 3. How many cells does a Ufine 3.7 V 4000mAh li-ion battery have?

This battery contains one single cell. Lithium-ion cells typically have a nominal voltage of 3.7V, and this battery achieves its capacity of 4000mAh through optimized cell design and materials.

Part 4. What is the 4000mAh battery life?

The battery life depends on the power consumption of the device it powers. For instance:

Device consuming 500mA: Approximately 8 hours.

Device consuming 1000mA: About 4 hours.

Factors like operating temperature, load conditions, and cycle life (typically 300 cycles for this battery) can influence longevity.

Part 5. PCB protection

Ufine’s 3.7V 4000mAh lithium battery comes with a built-in PCB (Protection Circuit Board). The PCB safeguards the battery by:

1. Preventing overcharging and over-discharging.

2. Protecting against short circuits.

3. Ensuring voltage stability and safety during operation.

Part 6. Li-ion 4000mAh battery price

Prices for lithium-ion batteries vary based on factors like bulk orders, customization requirements, and market conditions. Ufine Battery offers competitive pricing and custom battery solutions to meet diverse application needs.

Part 7. How long does it take to charge a 3.7V 4000mAh battery?

To estimate charging time:

Charging Time=Battery Capacity (mAh)/Charger Output Current (mA)

For example:

1. Using a 1000mA charger: Approximately 4 hours.

2. Using a 2000mA charger: Around 2 hours.

Part 8. Charger for 3.7V 4000mAh battery

This battery requires a 3.7V lithium-ion compatible charger with an output voltage of 4.2V and a charging current of 0.2C to 0.5C (800mA to 2000mA). Always choose chargers with built-in safety features like overcurrent and overvoltage protection.

Part 9. How to charge a 3.7V 4000mAh battery?

1. Connect to a Suitable Charger: Use a charger compatible with 3.7V lithium-ion batteries.

2. Monitor Charging: Ensure the charging voltage does not exceed 4.2V.

3. Avoid Overcharging: Disconnect the charger once fully charged (usually indicated by an LED light).

4. Temperature Check: Avoid charging at extreme temperatures.

Part 10. Maintenance and care tips

To maximize the performance and lifespan of your battery:

1. Avoid Overcharging: Disconnect once fully charged.

2. Use Compatible Devices: Ensure your device specifications match the battery.

3. Store Properly: Store in a cool, dry place at 50% charge if unused for extended periods.

4. Avoid Deep Discharges: Recharge before the battery depletes completely.

5. Inspect Regularly: Check for swelling, leakage, or damage.

With proper care and maintenance, the Ufine 3.7V 4000mAh lithium-ion battery can deliver reliable performance across various applications.