High-Capacity 21700 4800mAh Rechargeable Li-Ion Battery 3.7V

Name: High-Capacity 21700 4800mAh Rechargeable Li-Ion Battery 3.7V
Brand: satkit
SKU: 2a020201-21700-lion-4800mah
Price: 3.53 EUR
Availability: InStock

Brand: satkit

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21700 4800mAh Rechargeable Li-Ion Battery 3,7V

This high-quality rechargeable battery is a reliable choice for those looking for a long-lasting and efficient power source. With a nominal capacity of 4800mAh, it delivers stable, extended performance for electronic devices that require a powerful, long-life battery.

Key features:

Nominal capacity: 4800mAh
Nominal voltage: 3,7V
Full charge voltage: 4,2V
Full discharge voltage: 2,5V
Maximum charge current: 4.5A (1C)
Maximum discharge current: 15A (3C)
AC internal resistance (1 kHz): 12-18mΩ
Approximate weight: 72 grams
Dimensions: 70mm x 21mm
Rechargeable up to 1.000 cycles

Typical uses:

This 21700 battery is suitable for electronic devices that require a high-capacity rechargeable battery and stable voltage, such as torches, portable power tools, telecommunications devices and other electronic equipment that demand reliable power.

Compatibility:

Compatible with devices that accept 21700 batteries with a nominal voltage of 3,7V and standard dimensions of 70mm x 21mm. Ideal for replacing or upgrading batteries in compatible equipment.

Package contents:

1x 21700 4800mAh 3,7V Li-Ion rechargeable battery

With this high-capacity 21700 battery and quality guaranteed by Satkit, you'll get a stable and long-lasting power supply for your electronic devices.

4800mAh nominal capacity for long-lasting use
3.7V nominal voltage with 4.2V full charge
15A maximum discharge current for high performance
Rechargeable up to 1,000 cycles for extended use
Standard 70mm x 21mm dimensions, approximate weight 72 grams
Low internal resistance (12-18mΩ) for energy efficiency

Customer Questions & Answers

Is this battery compatible with devices that use 18650 cells?

No, the 21700 battery is not physically interchangeable with the 18650 due to its larger dimensions (21 mm versus 18 mm in diameter, and 70 mm versus 65 mm in length). You should check whether the device accepts the 21700 format before using it.

Which charger should I use and what charging current is recommended to extend its lifespan?

It is recommended to use a charger specifically for 21700 Li-Ion batteries, compatible with 3.7 V and with cut-off at 4.2 V. To maximise lifespan, charge at 0.5C–1C (2.4 A to 4.5 A for this battery). For the longest life, prefer 0.5C (2.4 A). Do not exceed 4.5 A charging current.

What discharge limits does it support and how does this affect performance in demanding applications?

The maximum discharge current is 15 A (3C). For high-drain devices, this allows up to 55.5 W of power (3.7 V × 15 A). Continuous discharge above this value may overheat the cell and reduce its lifespan.

What are the most relevant safety risks and what standards does this type of battery comply with?

Li-Ion batteries can be damaged if overcharged, discharged below 2.5 V or short-circuited. There may be a risk of thermal runaway, fire or explosion if misused. It is important that they have certifications such as UN38.3 and IEC 62133, although formal compliance should be confirmed with the seller.

What is the nominal capacity of this 21700 battery?

The nominal capacity is 4800mAh, which provides long-lasting power.

What voltage does this rechargeable battery have?

The nominal voltage is 3.7V with a full charge voltage of 4.2V.

How many times can this battery be recharged?

This battery is rechargeable up to 1,000 cycles, ensuring extended use.

What is the maximum discharge current?

The maximum discharge current is 15 amperes (15A), suitable for high-performance devices.

What are the battery dimensions and weight?

The battery measures 70mm long by 21mm in diameter and weighs approximately 72 grams.