Manual

Lithium cutoff:
Switch 3 of the DIP switch block selects lithium cutoff. If
switch 3 is in the down position as shown the SyRen will
automatically detect the number of series lithium cells at
startup, and set a cutoff voltage of 3.0 volts per cell. The
number of detected cells is flashed out on the Status LED.
If the number of cells detected is too low, your battery is in
a severely discharged state and must be charged before
operation. Failure to do so may cause damage to the battery pack. When 3.0V per cell is
reached, the SyRen will shut down, preventing damage to the battery pack. This is necessary
because a lithium battery pack discharged below 3.0v per cell will lose capacity and batteries
discharged below 2.0v per cell may not recharge – ever. Lithium cutoff mode may also be useful
to increase the number of battery cycles you can get when running from a lead acid battery in
non-critical applications. Because the system will continue to draw some power, even with the
motor shut down, it is important to unplug the battery from the SyRen promptly once the cutoff
is reached when using lithium batteries. If the SyRen is being run from NiCd, NiMH or alkaline
batteries, or from a power supply, switch 3 should be in the up position.
Lithium Cutoff enabled