RAVPower's FileHub Plus is a DLNA server, power bank, and Wi-Fi router: $29.50 (30% off) - 9to5Toys
Amazon.com: [5-in-1] RAVPower? FileHub Wireless SD Card Reader with 3000mAh Backup Battery, Wireless Mobile Storage Media Sharing, WLAN Hot Spot & NAS File Server - Black : Cell Phones & Accessories
The RAVPower FileHub: An All-In-One (Yet Oddly Niche) Wireless Storage Hub – Review Geek
RavPower Filehub AC750 Travel Router – The Doc's World