Galaxy S25 Edge Packs Only In-House Battery, Unlike Other S25 Phones

Just recently, Samsung pulled the wraps off the new Galaxy S25 Edge (hands-on), which is now available for pre-orders. It measures just 5.88mm, sporting a strikingly thin ultra-slim profile. This slim design doesn’t compromise durability, according to a Samsung spokesperson. But there are some caveats, like the lack of a telephoto camera on the Galaxy S25 Edge, and many are disappointed with the battery capacity.

Pre-order the Galaxy S25 Edge today and get a $50 credit, a free storage upgrade, and a FREE Mystery Box! Every Mystery Box includes a premium phone case, screen protector, cleaning kit, and desktop phone stand — all absolutely free.

Galaxy S25 Edge uses in-house battery

Inside that slim profile, Samsung’s latest Galaxy S25 Edge packs a 3,900mAh battery, developed in-house. More specifically, this 3,900mAh battery comes from Samsung SDI, the company’s battery-making unit, according to TheElec. Samsung is switching gears with the Galaxy S25 Edge by handing the reins to Samsung SDI as the sole initial battery supplier.

Unlike the Galaxy S25, S25+, and S25 Ultra — which shared battery duties with China’s ATL — SDI now carries the ball solo. That said, ATL may still be brought in for future production. But for now, SDI is leading the charge. Samsung also works with other battery makers like China’s BYD and Korea’s LG Energy Solution, keeping its supply chain diverse. Despite the supplier shift, quality remains a top priority.

Having said that, the main thing is the Galaxy S25 Edge still misses out on Silicon Carbon cells. At a time when Chinese competitors are embracing this battery tech, Samsung is taking a different route. Instead of jumping on the Silicon Carbon bandwagon, Samsung is cooking up its own battery technology, dubbed SUS CAN. If all goes according to plan, SUS CAN batteries could make their grand entrance with the Galaxy S26 series next year. Later on, the foldables might get the tech in late 2026.

Pre-order the Galaxy S25 Edge today and get a $50 credit, a free storage upgrade, and a FREE Mystery Box! Every Mystery Box includes a premium phone case, screen protector, cleaning kit, and desktop phone stand — all absolutely free.