LiFePO4 stands for Lithium Iron Phosphate, which is a type of lithium-ion battery chemistry. It is often used in rechargeable batteries due to its high energy density and long cycle life.

LiFePO4 batteries are known for their stability, safety, and durability. They are commonly used in applications such as electric vehicles, solar energy storage systems, and backup power supplies.

KET is a professional (LiFePO4) lithium iron phosphate battery manufacturer, we can provide you with expertise on LiFePO4. So you can Contact Us Now for more information!

In general, LiFePO4 batteries can handle charge currents between 0.5C and 3C.

As the capacity of different battery packs varies, the concept of how much "C" is used instead of how much "Amp" is used to describe the charge/discharge current of the battery. The "C" concept is commonly used to indicate the charge and discharge rates of batteries. It represents the ratio of the current (in amperes) to the capacity (in ampere-hours) of the battery. In simple terms, "C" is a way to express the charging or discharging speed relative to the battery's capacity.

To give you a clear understanding of the difference, we will illustrate the range of maximum charging currents by amp considering three examples:

Example 1: LiFePO4 Battery with 100Ah Capacity
Lower Limit: 0.5C
Maximum Charge Current = 0.5 x 100Ah = 50A
Upper Limit: 3C
Maximum Charge Current = 3 x 100Ah = 300A


Example 2: LiFePO4 Battery with 200Ah Capacity
Lower Limit: 0.5C
Maximum Charge Current = 0.5 x 200Ah = 100A
Upper Limit: 3C
Maximum Charge Current = 3 x 200Ah = 600A


Example 3: LiFePO4 Battery with 50Ah Capacity
Lower Limit: 0.5C
Maximum Charge Current = 0.5 x 50Ah = 25A
Upper Limit: 3C
Maximum Charge Current = 3 x 50Ah = 150A


Note: 0.5C-3C is then part of the manufacturer's customised content. We can customise the charging current to suit the customer's needs. So if you want to know the exact charging current of the battery pack you are using, you need to look at the battery's parameter label or ask the seller.

Here are some actual data to compare Lithium Iron Phosphate (LiFePO4) and Sealed Lead Acid (SLA) batteries:

Energy Density: LiFePO4 batteries have an energy density of about 120-160 Wh/kg, whereas SLA batteries have an energy density of around 30-50 Wh/kg.

Cycle Life: LiFePO4 batteries can typically endure 2000-5000 charge/discharge cycles before their capacity drops to 80% of the original. In contrast, SLA batteries usually have a cycle life of around 300-500 cycles.

Depth of Discharge (DoD): LiFePO4 batteries can safely handle a DoD of 80%. SLA batteries, on the other hand, should not be discharged beyond 50% DoD to maintain their lifespan.

Charging Efficiency: LiFePO4 batteries have a charging efficiency of 95-99%. This means they can convert 95-99% of the electrical energy supplied during charging into stored energy. SLA batteries typically have a charging efficiency of around 70-85%.

Weight: For example, a 100 Ah LiFePO4 battery may weigh around 12-15 kg, whereas a similar capacity SLA battery could weigh 30-40 kg or more.

Maintenance: LiFePO4 batteries are generally maintenance-free, while SLA batteries require periodic electrolyte level checks and topping up with distilled water.

Self-Discharge Rate: LiFePO4 batteries typically lose only 1-3% of their charge per month, while SLA batteries can self-discharge at a rate of 3-10% per month.

The resting voltage of a LiFePO4 (Lithium Iron Phosphate) battery refers to the voltage level of the battery when it is not being charged or discharged and is in a state of rest. It indicates the equilibrium voltage of the battery after it has stabilized and there is no active current flow.

The typical resting voltage of a fully charged LiFePO4 battery is around 3.2V per cell. So the resting voltages of the four common battery packs of different voltages in a fully charged state are

12V-LFP-Battery：12.8V
24V-LFP-Battery：25.6V
36V-LFP-Battery：38.4V
48V-LFP-Battery：51.2V

Here's a comparison between Lithium Iron Phosphate (LiFePO4) and Nickel-Metal Hydride (NiMH) batteries:

Energy Density: LiFePO4 batteries typically have an energy density of around 120-160 Wh/kg, while NiMH batteries have an energy density of about 60-100 Wh/kg.

Cycle Life: LiFePO4 batteries can endure 2000-5000 charge/discharge cycles before their capacity drops to 80% of the original. In contrast, NiMH batteries typically have a cycle life of around 500-1000 cycles.

Self-Discharge Rate: LiFePO4 batteries lose only about 1-3% of their charge per month, while NiMH batteries can lose up to 20% of their charge in the same period.

Charging Time: LiFePO4 batteries have a shorter charging time compared to NiMH batteries.

Environmental Impact: LiFePO4 batteries are more environmentally friendly than NiMH batteries. LiFePO4 batteries do not contain toxic heavy metals like cadmium, which is present in NiMH batteries.

The operating temperature of LiFePO4 batteries is -20°C to 60°C (-4°F to 140°F). LiFePO4 batteries exhibit good performance in cold weather conditions. Here are some characteristics of LiFePO4 batteries in cold temperatures:

Capacity Retention: LiFePO4 batteries have relatively high capacity retention in cold weather compared to other lithium-ion battery chemistries. They can maintain a significant portion of their rated capacity even in low temperatures.

Cold Cranking Performance: LiFePO4 batteries exhibit good cold cranking performance, enabling efficient engine ignition even in chilly conditions.

If you also need to use LiFePO4 batteries in environments below 20°C (4°F), then you can contact us. Our engineers can customise the heating of your LiFePO4 batteries so that they can be used in lower temperatures.