The filing, which every phone vendor has to submit before its products can sell in the US, points to a 3,600mAh battery for the S7 Edge, which is expected to have a 5.5-inch screen. In contrast, last year's smaller S6 Edge sported a 2,600mAh battery to power the 5.1-inch screen.
Once the cream of the phone crop, Samsung is hoping for a hit with the Galaxy S7 and S7 Edge. Although the Galaxy S6 Edge was generally well received for its curved metal and glass design, Samsung has lost ground in the global arms race. Buyers are gravitating to more budgeted devices, and brands like Huawei, ZTE, and Xiaomi are benefitting from the shift.
Samsung did not reply to a request for comment.
Remember that battery capacity doesn't always translate to longer battery life: the efficiency of the processor makes a huge difference in how long the battery lasts between a charge. It's also tough to forecast what sort of additional impact Android 6.0's Doze feature, which hibernated phone processes when the phone has been idle for hours, will have on the S7 Edge's battery life.
Either way, we're only a few weeks away from the Galaxy S7 and S7 Edge's launch. In the meantime, check out our running list of anticipated features in the year's first flagship phones.
Samsung is expected to introduce the Galaxy S7 at its Unpacked event on February 21 in Barcelona, Spain. CNET will be covering the event live.