The Galaxy Fold packs-in two battery modules to evenly distribute the weight of the handset. It has a 4,380mAh capacity with support for 15W fast-charging
technology. The built-in reverse charging tech turns your Galaxy Fold into a 9W wireless charging pad to juice up other compatible devices. On the connectivity front, the Galaxy Fold is equipped with dual-band Wi-Fi b/g/n/ac/6, Bluetooth 5.0, A-GPS, NFC, and USB 3.1 Type-C port. The device runs Android 9 Pie with Samsung's custom UI on top. It is designed to run up to three active apps on the primary display. For instance, you can browse the web, reply a message on WhatsApp, and keep an eye on cricket score simultaneously. All of this is possible, thanks to Screen Continuity, Multi-Resume, and Multi-Display functions that Google released with Android 9 and Android 10.