Galaxy S26 Edge to offer higher battery capacity without silicon-carbon tech

Yesterday, the confusion about the battery capacity of Samsung’s upcoming Galaxy S26 Edge finally cleared. It will have a 4,200mAh battery, a significant upgrade from the 3,900mAh unit in the Galaxy S25 Edge, and a very impressive number when you consider that the phone will be only 5.5mm thick (0.3mm thinner than its predecessor). However, some people might be wondering how the brand will manage to fit a larger battery in a thinner body. Is it planning to use the carbon-silicon technology? Well, we have some information on that front.

On X, @UniverseIce says that the “capacity” (read energy density) of the Galaxy S26 Edge’s battery has reached that of silicon-carbon batteries, meaning that the phone doesn’t have an Si-C battery and despite not using the silicon-carbon tech, Samsung has managed to make a battery that offers the energy density of Si-C batteries. The tipster also says that no other brand can offer a phone of a similar thickness with a higher battery capacity, suggesting that if even if they use Si-C batteries, they can’t offer a higher battery capacity in such a slim design.

Unfortunately, the tipster didn’t say which technology Samsung is using to offer this improvement. Maybe the brand is sticking with the tried and tested lithium-ion chemistry and has made technological advancements in the Li-ion space to offer this upgrade, or the company maybe using something completely new. Only time will tell.

According to previous reports, the Galaxy S26 series will feature the Qualcomm Snapdragon 8 Elite Gen 2 chipset in some regions and the Exynos 2600 in others. The lineup will have three devices, the Galaxy S26 Pro, Galaxy S26 Edge, and Galaxy S26 Ultra, where the first two phones are replacing the Galaxy S26 and Galaxy S26+.