The Galaxy S11 series is very likely to have much longer battery life in aggregate, compared to its S10 series predecessors. The reasoning behind this speculation is not only that it will probably run on more efficient processors than the ones we have now, or that Samsung will use a newer generation more frugal OLED display tech.
While both of these are true, the Galaxy S11 may have better battery life than the S10 simply because the eventual battery capacities indicate that the packs will be much larger.
