48V 2900mAh 18650 Lithium Battery for Smart Vacuum Cleaner

Additional information

Rated Voltage


Rated Capacity


Battery Size


Charge Temperature


Discharge Temperature




Lithium Battery Process Work Flow

We are a professional lithium battery factory in China. Now we briefly introduce how to produce lithium batteries. It starts from cathode & anode mixing, coating, baking, calendering, automatic slitting & cutting, winding, top & side sealing, electrolyte injection, pressing formation, forming, capacity grading, OCV1 & OVC2, cell to PCB, insulation and shipping. Welcome to contact and ask for the workflow table list.

Product Details

Nominal voltage: 48.1V
Nominal capacity: 2900mAh
Working voltage: 32.5V~54.6V
Working current: 10A
Overcurrent protection: 30±5A
Operating temperature range: 0-45℃ (charging), -20~60℃ (discharging)
Overcharge protection: 4.25V±0.025V
Over-discharge protection: 2.5V±0.05V

Charge balance function
Balanced starting voltage: 4.18V±0.025V
Balance current: 50±10mA
Charging temperature protection function: 65±5℃
Discharge temperature protection function: 65±5℃

The best 18650 lithium battery pack:

The numbers 18650 in the 18650 lithium battery represent the appearance size: 18 means a diameter of 18mm, 65 means a length of 65mm, and 0 means a cylindrical battery. It is a standard lithium-ion battery model set by Japan’s SONY company in order to save costs, called 18650 lithium battery.

18650 lithium battery pack usually consists of three parts: 18650 cells, protection board (usually called PCBA) and shell structure. The best 18650 lithium battery pack should choose the best of the following three components:

Using high-quality 18650 batteries:

The best 18650 lithium battery pack should be composed of first-line brand cells, and the mainstream capacity ranges from 1800mAh to 3500mAh. The single cell has undergone a series of safety tests and performance tests. After years of quality evaluation, high-quality batteries recommend the following:

Global first-line brand 18650 batteries: Samsung, Panasonic, LG, Sanyo, Sony.

China’s first-line brand 18650 batteries: Lishen, BAK, etc.

Multifunctional Protection Circuit Board (PCBA):

The core component of the lithium battery protection board is the protection IC. The main materials of the protection board are PCB, magnetic field effect transistor (MOS tube), NTC, PTC, capacitor, resistor, diode, triode, etc.

Overcharge protection: When the voltage of a certain string of the battery pack is greater than the maximum value (overvoltage) and the protection delay is reached, the IC controls the CMOS to turn off the charging circuit.

Over-discharge protection: When the voltage of a certain string of the battery pack is less than the maximum value (under-voltage), and the protection delay is reached, the IC controls the DMOS to turn off the discharge circuit.

Over-current and short-circuit protection: When the output current of the battery pack P+ and P- exceeds the over-current/short-circuit current value and reaches the over-current/short-circuit delay, the control circuit controls the discharge DMOS to turn off the discharge circuit and stop discharging.

High and low-temperature protection: When the temperature sensor reaches the temperature threshold and reaches the protection delay, the control circuit controls the charge and discharge MOS tube to turn off and stop the charge and discharge.

The lithium battery protection board also has the functions of power detection, remaining capacity display, battery working status display, communication remote control and other functions.

Shell/housing structure:

According to the needs of electrical appliances, design a matching shell structure, usually plastic shell, metal shell, simple PVC heat shrink, etc.

Exquisite lithium battery PACK technology:

For the 18650 lithium battery pack, the superb PACK capability is very important. It is necessary to have advanced equipment, skilled technical workers, a mature management model, and strict production requirements to ensure that the 18650 lithium battery pack can be welded, tested, There will be no omissions in important links such as aging and pre-shipment testing, and the best 18650 lithium battery pack will be produced.


  • How to evaluate the best battery pack solution?
    We will evaluate them based on customer requests, it shall consider voltage, capacity, resistance, size, temperature, input & output info, and others.
  • How long can customers get samples?
    We can deliver samples within 7~10 days once the datasheet is approved.
  • What’s the MOQ?
    No MOQ limits. We can accept small orders.

Ask For A Quick Quote

We will contact you within 1 working day, please pay attention to the email with the suffix “@hlcbattery.com”