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LiPo Battery Charge Rate Calculator

Aug 31, 2020   Pageview:55656

A LiPo battery stands for lithium polymer battery or also known as lithium-ion polymer battery because it uses lithium-ion technology. However, it is a rechargeable type of battery that has become the most popular choice in many consumer products. These batteries are known for offering higher specific energy than other lithium types of battery and are commonly used in applications where the critical feature is weight, for instance, radio-controlled aircraft and mobile devices.


Charge and discharge rates for battery are generally given as C or C-rate. It is a measure or calculation of the rate at which a battery is charged or discharged relative to the battery capacity. The C-rate is charge/discharge current divided by the capacity of the battery to store or keeps an electrical charge. And the C-rate is never -ve, be it for charging or discharging process.

If you want to know more about charging of LiPo battery, you can enter in:2 Cell LiPo Charger-Charging Hour. And if you want to get more knowledge about the features and applications of LiPo battery, you can enter in:What Is Lithium Polymer Battery-Advantages And Applications.

If you’re curious to know about the charge rate for your LiPo battery, then you’ve come to the right page. Here, you’ll get to know about LiPo battery charge rate, and how you can calculate it.

51.8V 5000mAh High Rate Li-Polymer Battery for Rescue Starting Device
High Rate Low Temperature Li-Polymer Battery -20℃ 10A Rate Discharge Nominal voltage: 51.8V Nominal capacity: 5000mAh Charging Current: ≤10A Discharging temperature: -20~60℃

What is the charge rate for a LiPo battery?

Most LiPo batteries available required to be charged rather slowly as compared to other batteries. For instance, a LiPo battery of the 3000mAh capacity should be charged at no more than 3 amps. Similar to the C-rating of a battery helps to determine what the safe continuous discharge of the battery it, there is C-rating for charging too, as mentioned earlier. Most LiPo batteries have a charge rate - 1C. This equation works in a similar fashion as the previous discharge rating, where 1000 mAh = 1 A.

Thus, for a battery with 3000 mAh capacity, you should charge at 3 A. For a battery with 5000 mAh, you should charge at 5 A and so on.  In short, the safest charge rate for most LiPo batteries available in the market is 1C or 1 X battery capacity in amps.

As more and more LiPo batteries are introducing currently that claims capabilities for faster charging. You may come across the battery saying that it has a 3C Charge Rate and given that the capacity of the batter is 5000 mAh or 5 amps. Thus, it means that you can safely charge the battery at a maximum of 15 amps. While it is best to go for a 1C charge rate, you should always check the label of the battery to figure out the maximum safe charge rate.

Another important thing you need to know that LiPo batteries need specialized care. Thus, it’s vital to use only a LiPo compatible charger for charging. These batteries charge utilizing a system known as CC or CV charging and it refers to Constant Current or Constant Voltage. The charger will retain the current or charge rate, constant until the battery nears its peak voltage. Afterward, it will keep that voltage, while minimizing the current.


How do you calculate the LiPo battery charge rate?

You will be pleased to know that most LiPo batteries available will tell you the maximum charge rate. However, if that’s not the case, then don’t worry. Just keep in mind that a maximum charge rate of the batter is 1 C. For instance, a 4000 mAh LiPo battery can be charged at a 4A.  Again, it’s recommended to use only special designed LiPo charger only and no other else if you want to use your battery for many next years to come.

Moreover, there are online calculators available to help you calculate battery charge rate or crating. All you need to do is to mention your battery basic specifications to know the charge rate.

26650 6.4V 3300mAh LiFePO4 Battery for Electronic Exploder
26650 6.4V 3300mAh LiFePO4 Battery Electronic Exploder Battery specification: 2S1P/6.4V/3300mAh Charging temperature:0~45℃ Discharging temperature:-20~60 ℃ Charging current: ≤1.65A

It’s quite important to know the C-rating of your battery as it helps you choose a LiPo pack. Unhappily, many LiPo battery manufacturers overstate C-rating value for marketing purposes. That’s why it’s good to use an online calculator for the right C-rating value. Or another thing you can do is to look at reviews or testing available for the battery you want to purchase.

Also, don’t ever overcharge your LiPo battery or any another battery as overcharging leads to catch fire and explode, in worse situations.


How many amps is a 2C charge rate?

As we told earlier, the safest charge rate for LiPo batteries is 1C.  You have to divide your LiPo pack capacity (mAh) by 1000 in order to convert from mA to A. This results in 5000mAh/1000 = 5 Ah. Therefore, 1C charge rate for battery with 5000mAh is 5A. And a 2C charge rate would be of this double or 10 A.

Again, you can use calculator available online to determine how many amps is a 2C charge rate if you are not good with numbers. However, when it comes to determining any battery specification, you should give a closure look at the battery’s label. The trusted and reputed manufacturers always provide information about the battery on its label.


There are certain precautions you should while charging your LiPo battery. While charging the battery, keep it as far away from the flammable materials as possible. As long as your battery is not physically damaged and cells of the battery are balanced, charging the battery is completely safe. However, it’s still good to take precautions as working with battery is always a risky thing.

The most important thing you should consider is that don’t ever charge the battery unattended. If something happens, you need to take action as soon as possible. Before charging, check or inspect each cell of the battery to ensure that they are balanced with the rest of your LiPo pack. Also, if you suspect any damage or puffing, you should charge your battery slowly and be quite watchful. Again, you should always go for the specially built LiPo chargers from the trusted manufacturers. This will charge your battery quite fast while keeping it safe.

That’s all on LiPo battery charge rate and ways to calculate it. Knowing these battery specifications will help you maintain your battery.


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