Battery Discharge Capacity Formula:
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Battery discharge capacity represents the total energy a battery can deliver, measured in watt-hours (Wh). It indicates how much energy is available for use before the battery needs recharging.
The calculator uses the discharge capacity formula:
Where:
Explanation: This formula calculates the total energy storage capacity by multiplying the battery's voltage by its charge capacity in amp-hours.
Details: Knowing the discharge capacity helps determine how long a battery will last under specific loads, plan energy usage, and compare different battery types and sizes.
Tips: Enter battery voltage in volts and amp-hour rating in Ah. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between Ah and Wh?
A: Amp-hours (Ah) measure charge capacity, while watt-hours (Wh) measure energy capacity. Wh accounts for both voltage and current.
Q2: Why is discharge capacity important?
A: It helps determine actual energy available for devices, allowing better planning of battery life and system design.
Q3: Can I use this for all battery types?
A: Yes, this formula works for lithium-ion, lead-acid, NiMH, and other battery chemistries as long as you have the correct voltage and Ah ratings.
Q4: How does temperature affect discharge capacity?
A: Lower temperatures typically reduce available capacity, while higher temperatures may increase it but can shorten battery lifespan.
Q5: What factors affect actual discharge capacity?
A: Discharge rate, temperature, age of battery, and depth of discharge all impact the actual usable capacity.