Product description apple power book g4 titanium 2 power laptop battery li ion 4400m ah dimensions wx hx l 110mm x 20mm x 115mm weight 0 42 kg run time up to 3 5 hours manufacturer warranty 1 year warranty compatability guaranteed 100 compatible ac adapter available cua0002b carair adapter available cuc0001b long life external battery available ubp0767b ultra long life external battery available ubp0766b