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Battery Voltage
NOTICE: DO NOT use a battery below 6.0 volts to power the PowerSafe
receiver.
Four-cell, 4.8-volt batteries do not provide enough voltage headroom
(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 receiver 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. Five-cell, 6-volt Ni-MH packs have become the
standard for many giant-scale applications. There is no voltage regulation in
the receiver. Voltage in = voltage out.
CAUTION: When charging Ni-MH batteries, make sure the battery fully
charges. Ni-MH batteries charged with peak detection fast chargers have a
tendency to false peak (i.e. not fully charge), which could lead to a crash.
Many pilots are using 2-cell Li-Po batteries to power their aircraft. Li-Po
batteries offer greater capacity for their size and weight, and are easier to
manage when charging. Before using Li-Po batteries, please check the voltage
specifications of your servos. Use of a voltage regulator, such as the Spektrum
VR6007 (SPMVR6007), might be necessary.
When a battery is connected to the PowerSafe receiver, 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 receiver to prevent over discharge.
Installation
The PowerSafe receiver requires a minimum of one remote receiver to
operate. Two or three remote receivers are included and, in most cases, it is
recommended that two or three receivers be used. Each receiver functions
independently and additional receivers (up to three) offer a more secure RF link
in difficult environments. The added security of redundancy should a failure
occur will outweigh the slight additional penalties of cost and weight.
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