The CWR-500(CSP) with PMIC - Battery Management WLCSP2.64*3.94 RoHS, manufactured by Celfras, is an electronic component used to manage the charging and discharging of batteries, such as Lithium Ion and Lead Acid. It is a multi-cell battery management component with charging, discharging, temperature, and voltage monitoring, as well as over-temperature, over-voltage, and under-voltage protection. It features adjustable parameters and protections for more precise cell balance and monitoring of application needs. The CWR-500 comes in an extremely small WLCSP2.64*3.94 package, and is RoHS compliant.