Synergy Digital Laptop Battery, Compatible with Toshiba Portege R830-01G Laptop, (Li-ion, 10.8V, 4400mAh) Ultra High Capacity, Replacement for Toshiba PA3831U-1BRS Battery - Walmart.com
New Genuine PA5043U-1BRS Battery for Toshiba Portege R700 R705 R830 R840 R930 R935 Laptop Batteries / AC Adapters - Newegg.com
Toshiba Portege R830 (PT321A-01L002) Review: Toshiba Portege R830 review: A 13.3in ultraportable with great features, strong build quality and excellent battery life - Notebooks - Notebooks, PCs & Printers - PC World Australia