Specialized Products offers charger multiplier
Specialized Products’ QuadLink is a 4-channel 6V and 12V DC charger multiplier.
With an input voltage of 4 to 18V DC, QuadLink splits and distributes the charger’s capabilities into 10-minute segments without adding charging capabilities.
The multiplier can charge batteries individually or as a group up to 8 amps.
Features include 4 holes in housing for mounting and a 5-foot, 9-inch functional output cable, with optional 5-foot and 25-foot separate extensions.