The CP12xx are external lithium ion battery packs compatible for Toshiba laptop computers. There are three models: CP1245 (12V, 4500mAHs, 53WHs, 128×71×24mm,278kg), CP1266 (12V, 6600mAHs, 79WHs, 133×71×40mm,417kg), CP1288 (12V, 8800mAHs, 106WHs, 556kg), all applicable for Toshiba laptops which require an input voltage (laptop?s adapter output voltage) between 9-15V, adjusting automatically by embedded intelligence device. They are the most exquisite external battery packs in the world.