Amazon.com: JJC H4n Protective Carrying Storage Pouch Case Bag for Zoom H4n Pro All Black & Tascam DR-40 Handy Portable Recorder replaces Zoom PCH-4n Case, with Clear Visible Front Face Cover Protector :
Zoom H4n Replacement Battery Cover by kaptaink_cg - Thingiverse
Zoom H4n Pro All Black 4-Track Portable Recorder (2020 Model) with SKB iSeries Waterproof Case, Windbuster, 16GB Memory Card & Remote Control Bundle - Walmart.com
Battery cover for Zoom H4n Pro
Zoom BCQ-2N Battery Case for Q2n/Q2n-4K | Sweetwater