User Manual
4
5
Supply pOWER TO ThE ChaRgER
The Twin Peak can either be powered by plugging it into a standard AC wall outlet (110V) or it can be
connected to a 12V DC power source, such as an automobile 12V battery (engine not running) or a
12V DC power supply.
CAUTION: Never connect the AC and DC input cords to an active power source at the same time. This
will void the warranty, cause product damage and possibly injure the user.
CAUTION: If you choose to power your charger with an automobile battery, never do so with the
automobile running as fluctuation in power can cause product malfunction and possibly
injury.
AC Power
To power the charger, use the attached standard electrical plug and plug into a standard 110V wall outlet.
NOTICE: Always consult collateral materials or Horizon Hobby before using with sources other than
standard 110V AC wall outlet.
DC Power
To power the charger, attach the included red (positive) alligator clip to the red (positive) terminal of the 12V
power source. Attach the black (negative) alligator clip to the black (negative) terminal of the 12V power
source. Make sure you follow proper polarities at all times.
WARNING: Always make sure that you follow proper polarities at all times or electrical shock will occur.
Charging 6/7-Cell Ni-Cd or Ni-MH Car Packs
1. Connect the Twin Peak to an appropriate AC or DC power source.
2. Connect the battery(ies) to the output charge lead(s). The LEDs on the faceplate indicate pack
“A” and “B”.
NOTE: The longer charge lead matches pack “B”.
3. Push the Start button. A brief diagnostic test determines the charge current based upon the battery
voltage. The LED will turn solid red during the charge process.
4. The charger will automatically charge at 4 amps and will stop fast charging when the battery has
been fully charged. If you are charging two batteries simultaneously and one of the batteries peaks,
the other battery will continue to charge until it has also peaked. After the battery has peaked, the
charger will automatically switch to trickle charge. You will know that the charger is in trickle charge
when the corresponding LED continually flashes.
5. If you choose to re-peak your battery(ies), simply push the Start button without disconnecting the
battery(ies) from the output charge lead. Do not re-peak the battery(ies) more than once during a
charge cycle.
* If at any time during the charge process the battery pack(s) become hot, unplug the battery
immediately and discontinue the charge process.
NOTICE: Never re-peak the battery(ies) more than once during the charge cycle.
Charging 4/5-Cell Ni-Cd or Ni-MH Receiver Packs
1. Connect the Twin Peak to an appropriate AC or DC power source.
2. Connect the battery(ies) to the output charge leads with the included receiver pack charge lead
adapter. The LEDs on the faceplate indicate pack “A” and “B”.
NOTE: The longer charge lead matches pack “B”.
3. Push the Start button. A brief diagnostic test determines the charge current based upon the battery
voltage. The LED will turn solid red during the charge process.
4. The charger will charge the receiver packs at 1 amp. When the battery(ies) have peaked, the
charger will stop fast charging and transition to trickle charge. If you are charging two batteries
simultaneously and one of the batteries has peaked, the other battery will continue to charge until it
has peaked as well. You will know that the charger is in trickle charge when the corresponding LED
continually flashes.
5. If you choose to re-peak your battery(ies), simply push the Start button without disconnecting the
battery(ies) from the output charge lead. Do not re-peak the battery(ies) more than once during the
charge process.
NOTICE: Never re-peak the battery(ies) more than once during the charge cycle.
CAUTION: Never re-peak a warm battery as the overcharging can damage the products and possibly
the user.
WARNING: If at any time during the charge process the battery pack(s) become hot (over 140 ºF),
unplug the battery immediately and discontinue the charge process.
TRICklE ChaRgE
Once the battery pack has peaked, the charger will automatically transition to trickle charge. Because the
Twin Peak can charge two packs at the same time, there will be times when one of your packs will be on
trickle charge while the other battery is still fast charging. You will know the battery is on trickle when the
LED changes from solid to flashing. The trickle charge rate is 100mA.
RE-pEakINg
Once the battery(ies) have peaked, you can re-peak them. With the battery packs still connected, simply
push the Start button, and the LED will turn solid. When the battery packs have re-peaked, the charger will
once again transition to trickle charge, and the LED will flash. Failure to follow this procedure could cause
damage to both the charger and battery packs.
NOTICE: Check with the battery manufacturer to ensure peaking is possible. Failure to follow correct
peaking procedure could cause damage to both the charger and battery packs.
fuSES
This charger is protected by a 2-amp buss fuse (DYN4004). If you need to replace this fuse, always replace
it with a fuse of the same rating. Your local hobby shop should stock this fuse. You may also find this fuse at
automotive stores.