SJ Perfect Balancer

Japanese company Powers International have started selling this, what is effectively a voltage regulator, by SJ called the Perfect Balancer. Used for charging you Lipo cells (2-5 cells), it is connected between your normal charger and the battery and it equalizes the power going to the cells to ensure correct and complete charging. When not connected to your charger it can be used as a discharger, providing balanced and safe discharging between cells.

Source: Powers International [powers-international.com]