IBM ThinkPad battery series is a part of the Lenovo batteries because IBM was acquired by Lenovo and then became a sub-brand of Lenovo in 2005. If your ThinkPad battery not charging or drains quickly? Change it with a new one! Our ThinkPad laptop batteries are assembled by the high-quality cells and components to ensure faster charging and longer life. Each ThinkPad battery replacement undergoes multiple quality and safety tests. Moreover, it is covered with a 30-day money-back guarantee and 12-month warranty. You can rest assured to buy and use them!