With the Sony WI-SP510, users also get a sizable battery life of about 15 hours, as per the company, which is on the higher side for wireless earphones. In our tests, at about 60-65 percent volume, the earphones lasted 14 hours and 30 minutes approximately, which is quite exceptional. Charging up the headphones is a speedy affair as well, a mere 3 hours of charging gets the earphones back up from zero battery to full charge.
PERFORMANCE
Sporting 12mm drivers, the Sony WI-SP510 offers a relatively pleasing sound profile and good audio reproduction. However, there’s a serious chink in the armor of these earphones. The noise floor (amount of white noise produced by the headphones) is inexplicably high, especially for headphones from a brand like Sony. So, due to this unfortunate but major flaw, we have to advise users who listen to lots of podcasts, audiobooks, and quieter genres of music, to steer clear of these headphones since the relatively jarring white noise could bother you (like it bothered us during our tests).
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