The apple laptop batteries

Beginning in 2009, Hewlett-Packard offered a notebook battery upgrade that was guaranteed for three years.

Boston-Power released the announcement on Wednesday, a supplier of lithium-ion batteries that will sell its Sonata battery to HP. Representatives from HP and Boston-Power declined to divulge many details on the relationship, primarily as B-P is a startup company, ramping production to meet the demands of its first customer.

HP representative  said that the company will make the Sonata apple ibook g4 14 inch battery available on some mainstream consumer notebooks, without specifying which models. HP's commercial notebook division is "looking at it," a spokesman said.

The apple macbook pro 15 inch battery upgrade will cost between $20 and $30, the HP spokesman said. HP will market it as the HP Enviro Series program notebook battery with Sonata technology.

The guarantee will cover the performance of the battery, specifically a certain capacity level, according to the HP spokesman. If the apple a1175 battery's capacity drops below the guaranteed level -- a value less than 100 percent, the HP spokesman said -- a user can exchange the battery for another. For its part, Boston-Power markets Sonata as a technology that delivers "like-new performance" for three years, offering the "same, unwavering capacity of a new battery that entire time".

Although lithium-ion batteries have been plagued with a rash of problems, a Boston-Power spokesman said the company "was fundamentally founded on safety. It's a non-negotiable issue."