Use the correct battery number
Over-ear headphones usually quote one continuous listening figure. Earbuds often quote both listening time per charge and total time after case recharges. Those figures should not be mixed.
Noise cancellation changes runtime
Active noise cancellation, transparency mode, spatial audio and high-quality codecs can reduce battery life. Compare figures that use similar settings whenever possible.
Quick charge can matter more than the maximum
A traveler who frequently forgets to charge may value ten minutes of charging that restores several hours of listening more than a small difference in total capacity.
Put the idea into practice.
Open the comparison studio and see the exact values, meters and field winners together.
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