Spektrum PowerSafe AR9100, User Manual, Page: 8 / 20

Spektrum AR9100
Battery Voltage
IMPORTANT: DO not use a 4-cell 4.8-volt battery to power
the PowerSafe.
Four-cell 4.8-volt batteries do not provide enough voltage head room
(additional margin needed) necessary to power the system when
heavily loaded. Under load the system voltage can drop below the
voltage system’s minimum operating voltage threshold (3.5 volts) and
cause loss of control.
The PowerSafe is capable of handling voltages from 6.0 to 10.0 volts.
The voltage limitations are generally the servos. Most servos are
compatible with 5-cell 6-volt packs, however, and 5-cell 6-volt NiMH
packs have become the standard for many giant-scale applications.
Be aware that NiMH batteries have tendencies to false
peak when being fast charged.
Be especially careful and sure
that the when using NiMH batteries that they are fully charged and
have not false peaked.
Many pilots are using 2-cell LiPo batteries to power their aircraft.
LiPo’s offer greater capacity for their size and weight, plus are easier
to manage charging (no false peaks and no self-discharge issues
depending on servo capability and warranty).
Note: When a battery is connected to the PowerSafe a low current
drain of less than 1mA occurs even when the switch is turned off.
If the system is going to be stored for any length of time, it’s
important that the battery(s) be disconnected from the PowerSafe to
prevent over-discharge.