PortaCel-USA (High Capacity 5200mAh/77Wh, 8 Cell) Laptop Battery for Apple Powerbook G4 15" Titanium Series (616-0132, 616-0133, 616-0139, 616-0151, 661-2441,661-2561, 661-2740,  A1012, M6091,M8244) PortaCel-USA (High Capacity 5200mAh/77Wh,14.8V,8 Cell) Laptop Battery for Apple Powerbook G4 15" Titanium Series(616-0132, 616-0133, 616-0139, 616-0151, 661-2441, 661-2561, 661-2740, A1012, M6091, M8244, M8244G, M8244G/A, M8244G/B, M8511) Brand-new OEM compatible replacement, meets or exceeds OEM spec. Free USPS Priority Shipping with One Year Warranty! Free Battery case for first 100 customer