Hewlett-Packard, the American company known for its production of, for example, notebooks. These have batteries to allow the user to run the battery, but a battery from HP loses performance and must be replaced over time. Today's market has various batteries. It can be installed not only original HP / Compaq batteries, but also custom replicas. For example, batteries from the innovative Green Cell brand can be installed. Batteries from this manufacturer allow error-free and comfortable working on the laptop.