Here is a list from my Power thread:
http://taperssection.com/index.php?topic=150794.0Some of the links may not be up to date
Anker Astro Pro 14,400mAh Multi-voltage / 9,12 & 5v USB Port / Size N, 5.50mm OD × 2.50mm ID
http://www.ianker.com/support-c1-g212.htmlAnker Astro Pro2 20000mAh Multi-voltage / 12,16,19v & 5v USB Port / Size M, 5.50mm OD × 2.10mm ID
http://www.ianker.com/product/79AN20L-SAAnker Astro3 1000maH / Astro Pro10000mAh Multi-voltage / 9,12v & 5v USB Port / Size M, 5.50mm OD × 2.10mm ID
http://www.ianker.com/anker-astro-external-battery-backup-charger/product/79UN5V2-B16P100AAnker 2nd Gen Astro Pro2 20000mAh 4-Port / 9,12v & 5v USB Ports / 4.30 OD x 1.60 mm ID (Size B, 4.00mm OD × 1.70mm ID Should be work)
http://www.ianker.com/product/79AN7906-BAAPP-GD20000A Portable Power Bank 20000mAh / 9,12,16,19v & 5v USB Port / Size N, 5.50mm OD × 2.50mm ID
http://www.ebay.com/itm/Power-Bank-High-Capacity-20000mAh-Multi-voltage-5V-9V-12V-16V-19V-20V-/281028105712?pt=PDA_Accessories&hash=item416e9495f0Bixnet BP160 / 12,19v & 5v USB Port / Size N, 5.50mm OD × 2.50mm ID
http://www.bixnet.com/unpowbat.htmlBattery Geek Mobile Power Station (Different Models) / Size N, 5.50mm OD × 2.50mm ID
http://www.thebatterygeeks.com/External-Laptop-Batteries-for-PC-Mac-Tablets-s/1.htmTekkeon MP3300 / 3,4.5,5,6,7.5,9,12,14v / KPPX-3P Kycon DC Power Connector (Discontinued)
http://www.tekkeon.com/downloads/UG_mpALL_33_3400.pdfTekkeon MP3400 / 5,6,7.5,9,12,14,16,19v / KPPX-3P Kycon DC Power Connector (Discontinued)
http://www.tekkeon.com/downloads/UG_mpALL_33_3400.pdfTekkeon MP3450 / 5,6,7.5,9,12,14,16,19v & 5v USB port / KPPX-3P Kycon DC Power Connector
http://www.tekkeon.com/products-mypowerall.htmlNaztech PB15000 Universal Power Bank Charger / 9,12,16,18,19,20,21v & 5v USB Port / Size N, 5.50mm OD × 2.50mm ID
http://www.amazon.com/gp/product/B007URKIGC/ or ebay source here: