how to prolong the life of an 18650 battery - 18650 battery cell

The 18650 battery has many important specifications, including: in this manual, I would like to talk about the maximum cycle life and how to use this measure to extend the life of the battery.
What is a cycle?
This is considered a cycle when the 18650 battery is charged and discharged.
Discharge happens when you use the battery to power.
Take out the electricity from your device and the battery discharge current.
You can also discharge the battery using a battery test device.
How to calculate cycle life?
Cycle life is determined by the difference in capacity of the cell from the first start
Use the rating to the current rating.
For example, if your phone starts at 3000, but now it's only 2900.
2900 mAh is 96% of the original capacity.
When this percentage reaches 80%, we say the life cycle is over (
Even if you might get thousands of cycles from the battery).
If we use a 3000 Battery, when do we say its life is over? (
80% of 3000 is 2400)
So when the battery capacity reaches 2400, we say its cycle life is over.
How many cycles does a typical 18650 battery have?
The typical cycle life of most modern 18650 batteries is 300-500 (
Charging and discharging cycle). When in high-amp or high-
In the case of drainage, this can be greatly reduced to 200 cycles.
If the maximum discharge current limit is exceeded (A)
You can reduce the cycle life to 50 cycles.
Under optimal conditions, your cells may reach more than 500 cycles.
Some chemicals can cycle thousands of times before reaching 80% of their capacity.
The rated temperature of 18650 batteries is usually between 20 and 25 degrees Celsius.
Any deviation from this will result in a slight loss of efficiency. A 10-
Degree deviation may result in loss of 20 or 30 mAh.
In extreme cases below zero or above 70 degrees, cell degradation is much faster.
Using a battery at a sub-optimal temperature reduces its cycle life.
When you use your phone, let it rest if you notice it's getting hot.
Your phone should not get hot under normal useto-
Touch, never more than 60 degrees.
If it's getting hot, you're done. stressing it.
If you are completely worried about cycle life, not capacity, then you may not even be fully charged.
Instead, you may charge part of the fee.
This is only say 3 when you charge the battery. 8 v instead of 4. 2V.
You will see less capacity, but less pressure on your cells and increased cycle life.
Overcharging increases capacity, but this is dangerous and reduces battery life.
Many Chargers have the ability to reduce charging current.
"Fast charging" can be 1 amp or higher.
While it will charge your cells faster, it will reduce their cycle life.
Please note this chart, there is a big difference in the cycle life affected by charging.
Remember what it was?
If not, I suggest going back to the first step.
When you discharge a cell, you can choose the incision of it
As we have already discussed.
But we can also choose the number of amps we draw the current.
The larger the current, the smaller the capacity we end up seeing.
High current discharge (called high-drain)
It also reduces the cycle life of cells.
Use as few amps as possible.
Official tests by LG, Samsung, Panasonic, Sony and other companies usually perform discharge tests at 0. 5 or 0. 8 amps.
On the other side of the partial charge is a partial discharge.
This is not a complete loop, but a local one.
The advantage of it is to reduce the pressure of the battery and improve the cycle life.
So instead of discharging all the way to 2.
8 V, or whatever the rated voltage of your battery, you may only discharge to 3. 2V.
Different cellular reactions are different.
Many 18650 batteries can reach 1000 cycles under the right conditions. The lithium-
The ion 18650 battery with the highest cycle life is lithium iron phosphate (LiFePO4)battery.