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Battery Operation Procedures
Please full charge battery before first use
Using One Battery
• The EX150Li allows the option of using one or two battery packs.
• When using one battery, simply plug the battery into either one of the two battery
connectors (left or right).
• Be sure to secure the unused battery connector by placing electrical tape over the
contacts.
• When the system is powered using one battery, the battery indicator light bar on
control panel will only emit light for one battery, when the system is powered on.
Using Two Batteries
• The EX150Li offers a true redundant dual battery system.
• When using two batteries of identical charge level, batteries are connected in parallel to
increase significantly the total runtime and airflow performance.
• When using two battery packs, each pack functions independently and is isolated
from the other so that if one pack should fail (open circuit, short-circuit, or become
discharged) the other battery will provide power to operate the system.
• When using dual batteries, it’s important that both batteries be of the same charge
level and ideally of the same age and condition.
• It’s normal for one battery to discharge slightly more than the other. This is the nature
of a truly redundant isolated battery system.
• The battery that has the higher voltage will discharge at a faster rate (until its voltage
equals the other battery).
• We recommend that use both batteries on the Same State of Charge (or at least as
close as possible). If this is not possible, the controller will eventually bring batteries to
a balanced charge level.
• To keep battery packs healthy for long-term use, a simple implementation of cell-
balancing, internal to the battery pack, includes a FET placed in parallel with each cell
and controlled by a comparator for simple voltage based algorithms that turn-on the
bypass FETs during the onset of voltage differences, controlled by a microcontroller
for more complex and effective algorithms that can work continuously regardless of
variations of voltage differences.
