Futaba 4YF 2.4GHz FHSS - Manual (Page 8)

8
BATTERY REPLACEMENT METHOD (4 AA SIZE BATTERIES)
1. Remove the battery cover from the transmitter by sliding it in the direction of
the arrow in the figure.
2. Insert four new AA size batteries.
3. Slide the battery cover back onto the case.
ｎCAUTION
ｊ
Always be sure you reinsert the batteries in the correct polarity direction. If
the batteries are loaded incorrectly, the transmitter may be damaged.
ｊ When the transmitter will not be used for any short or long period of time,
always remove the batteries. If the batteries do happen to leak , clean the
battery case and contacts thoroughly. Make sure the contacts are free of
corrosion.
• Low Battery Alarm: If the transmitter battery voltage drops below approx.
4.2V, the red LED on the front of the transmitter will slowly blink. Land your
model immediately before losing control.
CHARGING THE RECEIVER Ni-Cd BATTERIES
Ni-Cd batteries require special care and charging.
Read the charging instructions carefully.
NOTE: The batteries are supplied partially charged, but will require a full, overnight charge before the model may be flown.
1. The receiver charging cord may be connected to the batteries two different ways: The charge cord may be connected
directly to the battery pack, or to the vacant charge connector (black) coming from the on/off switch in the model. Charging
“through the switch” is preferred as there will be no need to disconnect the battery.
2. Plug the A/C wall charger into a wall outlet. Note: If the wall outlet can be turned off by a switch in the room, be certain the
switch remains on after leaving the room. Otherwise, the batteries will not be charged!
3. The charger’s LED (Light-emitting diode) should light red, indicating that current is flowing and the batteries are being
charged. Discharged batteries will take about 15 hours to fully charge. If using an aftermarket fast charger, be certain to
follow the manufacturer’s instructions provided with the charger so you do not overcharge the batteries. NEVER
charge the batteries at a rate higher than 1,000mA. The batteries should also be discharged periodically to prevent a
condition called “memory.” If, for example, only two flights are made each time you go flying, the batteries will not have
“reached” very far down into their full capacity. After doing this several times the batteries will “remember” and eventually
“think” they can supply only enough power for two flights. After two flights the batteries may not provide enough power to
operate the system, thus causing a crash. To erase any potential memory, cycle the batteries by discharging, then charging
them with a commercial battery cycler, or leave the system on and exercise the servos by moving the transmitter sticks
until the servos are moving very slowly, indicating that the battery is discharged. Cycling should be done every one to
two months, even during the winter or periods of long storage. If using a cycler with a readout, note the capacity after the
batteries have been cycled. If there is a noticeable drop in capacity the batteries should be replaced.
Note: Charging your batteries with the special Futaba A/C battery charger is always safe. However, fast-charging with
an aftermarket charger is acceptable as long as you know how to properly operate the charger. NEVER charge at a rate
higher than 1,000 mA (1 Amp). If not done correctly, fast-charging can damage the batteries.