18650 3.6V 40Ah Lithium Battery Pack

Additional information

Cell model


Battery specification


Nominal voltage


Nominal capacity


Charging voltage


Charging current


Discharge current


Discharge cut-off voltage


Charging temperature


Discharge temperature






Battery shell

PVC outsourcing

Product Details

Hlcbattery is a premium prismatic lithium-ion battery manufacturer in China. We would like to design and produce li-ion batteries to meet technical requests.

18650 3.6V lithium battery features:

  • Shockproof: Through PCV packaging, the interior is filled with shockproof structure design to meet the requirements of high safety and high reliability;
  • High current: high current output, maximum 3C output;
  • Data communication management: Adopt software management chip, precise data transmission, and precise temperature control to eliminate potential safety hazards to the greatest extent;
  • The battery pack is safe, with a temperature probe, and the temperature exceeds the automatic start protection;
  • The battery pack has a high cycle life and is in line with the value concepts of low carbon, energy-saving and environmental protection;

What should I do if the lithium battery cannot be charged?

Lithium batteries have always had the characteristics of self-discharge. If they are not used for a long time and are not charged for an intermediate period of time, the self-discharge will exhaust the battery power, resulting in the battery’s voltage being too low and unable to be charged. So, what should I do if the lithium battery cannot be charged? Let’s take a look.

  1. In the use of lithium batteries, it should be noted that the battery will enter the dormant state after being placed for a period of time.
  2. Self-discharge will drain the battery, and the capacity will be lower than the normal value at this time, which will cause the battery to be too low to charge.
  3. But lithium batteries are easy to activate, as long as 3-5 normal charge-discharge cycles can be used to activate the battery and restore its normal capacity.
  4. Due to the characteristics of the lithium battery itself, it is determined that the lithium battery has almost no memory effect, so the new lithium battery in the user’s mobile phone does not require special methods and equipment during the activation process.
  5. Not only in theory, but from my own practice, it is best to use the standard method to charge this “natural activation” method from the beginning.

What is the reason for the lithium battery not charging?

  • Lithium battery is over-discharged
    That is to say, the discharge of the lithium battery is very low, it is in a state of deep discharge, and the power is basically used up, so that it is as low as the cut-off voltage of the lithium battery. At this time, an activation method can be adopted, but this is not necessarily effective;

  • There is a problem with the charger or charging line
    First of all, you should check whether there is any problem with the charger. The method is very simple. You can directly measure the output voltage or connect the load with the corresponding voltage to observe. As for the problem with the line, it will take a little effort. After all, it involves circuit hardware and other problems, it is necessary When directly disassembling and analyzing.
  • Lithium battery has been used for a long time, the battery fails
    The possibility of this happening is relatively small, but it cannot be ruled out. You should be familiar with your own battery, and you should replace the battery after using it for a long time;
  • Problems with battery charging IC or BMS system
    The battery management system has problems due to the unbalance of the cells, which leads to the misjudgment of the management IC and the inability to detect the voltage or current.

Ask For A Quick Quote

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