Samsung is quietly getting its next wave of wireless earbuds ready, and fresh leaks are now shining a light on the Galaxy Buds4 Pro and the more affordable Galaxy Buds4. 
After early renders teased a refreshed design, the latest certification reports focus on one of the most important aspects for everyday users: how big the batteries really are.
According to the new information, the Galaxy Buds4 Pro will step up to a 57 mAh cell in each earbud. That is a modest but meaningful bump over the 53 mAh batteries inside the previous Galaxy Buds3 Pro, suggesting slightly longer listening time or more headroom for features like active noise cancelling and higher bitrate audio. The regular Galaxy Buds4, however, are rumored to move in the opposite direction, dropping to 42 mAh per bud compared with the 48 mAh cells used in the Galaxy Buds3.
On paper, shrinking the battery in the non Pro model looks like a downgrade, but the story is more nuanced. The leak also mentions a larger charging case, which should carry a bigger internal battery to offset the lower capacity inside the buds themselves. If Samsung has also improved the efficiency of its chipsets, Bluetooth radios and noise cancelling algorithms, the real world endurance of the Buds4 may end up very close to, or even matching, the older generation.
This split strategy hints at how Samsung sees the lineup in 2026. The Buds4 Pro are shaping up to be the long haul option for frequent travellers, commuters and gamers who want top tier noise cancelling and do not want to think about battery anxiety. The standard Buds4 look positioned as a lighter, more compact pair aimed at casual listeners who still want tight integration with Galaxy phones but are willing to rely more on the charging case during the day.
Beyond capacity numbers, fans are already debating the audio side of the equation. Some early commenters say that if Samsung once again skips high end codecs such as LDAC, the new buds will be a hard sell for enthusiasts, especially when rivals like the Soundpeats H3 already deliver wide codec support and surprisingly good sound for the price. For now, codec support on the Buds4 family has not been confirmed, so it remains an open question that could strongly influence how these earbuds are received at launch.
Timing, at least, seems much clearer. The Galaxy Buds4 Pro and Buds4 are widely expected to debut alongside the Galaxy S26 series, with leaks pointing to a late January 2026 announcement window. If those plans hold, Samsung still has months to fine tune software, battery optimisation and audio tuning, which means the final experience could end up quite different from what the raw capacity figures alone might suggest.