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Battery cycle
repair
Also called: charge cycle
Plain-language definition
Plain-language definition
One full battery use equal to 100% of its capacity, even across several charges.
Why it matters
Cycle count helps explain battery aging but does not by itself prove battery health or remaining runtime.
Technical detail
A cycle is accumulated discharge totaling the battery’s rated capacity; two 50% discharges can together count as one cycle.
Examples
- Using 40% today and 60% tomorrow adds up to one battery cycle.
Related terms
Sources and review
Reviewed July 12, 2026 by [email protected]. Next review due July 11, 2027.
- Device Safety — iFixit Accessed 7/11/2026
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