The deployment of automotive start-stop systems, eCall telematics, and hybrid vehicles is fueling the need for advanced battery management systems that not only charge the battery in a safe manner but also prolong its useful life. There are many battery chemistries available in the market today, which makes the selection decision more difficult when trying to pick the right one for a particular application, along with a suitable charging solution. This white paper explains Li-ion and Lithium iron phosphate chemistries, including their characteristics and charging profiles. It also identifies charging solutions that derive the maximum energy from the battery while maximizing battery life and reliability.