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Lithium Battery Capacity Formula:
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Lithium battery capacity represents the total energy a battery can store and deliver over its lifetime. It's calculated based on the rated capacity in milliamp-hours (mAh) and the number of charge cycles the battery can undergo.
The calculator uses the lithium battery capacity formula:
Where:
Explanation: This formula calculates the total energy capacity in watt-hours (Wh) that a lithium battery can deliver over its lifetime, accounting for both its initial capacity and the number of cycles it can endure.
Details: Accurate battery capacity estimation is crucial for designing power systems, estimating battery lifespan, and determining the appropriate battery size for specific applications.
Tips: Enter the battery's rated capacity in mAh and the expected number of charge cycles. Both values must be positive numbers.
Q1: Why convert mAh to Wh?
A: Watt-hours provide a more accurate measure of energy capacity as they account for both voltage and current, giving a true representation of energy storage.
Q2: What is a typical cycle life for lithium batteries?
A: Most lithium-ion batteries last between 300-500 cycles before capacity drops to 80% of original, though this varies by chemistry and usage patterns.
Q3: How does temperature affect battery capacity?
A: Extreme temperatures can significantly reduce both immediate capacity and long-term cycle life. Optimal performance is typically between 15-35°C.
Q4: Are there different types of lithium batteries?
A: Yes, including Lithium-ion (Li-ion), Lithium Polymer (LiPo), and Lithium Iron Phosphate (LiFePO4), each with different characteristics and cycle lives.
Q5: How accurate is this calculation for real-world applications?
A: This provides an estimate. Actual capacity can vary based on discharge rate, temperature, age, and specific battery chemistry.