Epson Rechargeable Battery for P-4000 Part #: B32B818262
Li Ion Battery, Rechargeable, 3 Hours Battery Life, Compatible with Epson P-4000 Multimedia Storage Viewer
Socket Communication Mobile Power Pack Part #: AC4009-614
Compatible with Socket Cordless 56K Modem, GPS Receiver, Cordless Hand Scanner, and Cordless Serial Adapter as well as Pocket PCs, PDAs, Blackberry devices, Mobile Phones and Smart Phones, iPod and PSP, and Digital Cameras; High Capacity Lithium-Ion Battery