The IPS-BB-48 is a voltage equalizing device for AGM, GEL, VRLA, NiCd, NiMH, LiFePO batteries of 2.4V / 3.6V / 9V / 12V that are connected in series or parallel.
Equalizing the voltage on the batteries during operation extends battery life. Balancer starts equalizing voltage as low as 10mV difference.