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Thank for you purchasing the Prophet Pro
™
4–7 Cell DC Peak Prediction charger. This charger
uses a unique peak prediction circuitry that ensures an accurate charge every time and protects
your Ni-Cd and Ni-MH batteries from the dangers of over-charging. This charger continuously
monitors the battery’s charge curve and calculates (predicts) when the peak will occur (100%
charge) and then stops fast charging at exactly that point. This is essential in order to avoid
damaging Ni-Cd and especially Ni-MH cells, which are very sensitive to heat. This circuitry is
superior to conventional peak detection circuitry that continues to fast charge even after the
batteries are fully charged, which can damage Ni-Cd and Ni-MH cells.
After your battery pack has peaked, the charger automatically switches to trickle charge. This
feature will keep your batteries fully charged and in top performing condition until you are once
again ready to use them.
Connecting Input Power Source
This charger is powered by using the provided alligator clips to connect the charger to a 12V DC
power source, such as a 12V hobby battery (HAN102) or an automobile battery. Connect the
red (positive) end of the alligator clips to the red terminal of the DC power source and the black
(negative) end of the alligator clips to the black terminal of the DC power source. If you choose
to power your charger with an automobile battery, never do so with the automobile running!
Fail-Safe
If the power source has been interrupted or drops below a usable voltage level, the Prophet Pro
automatically goes into a Fail-Safe mode to let you know that the battery has not been fully
charged. In this mode, the charge status LED will flash “RED” and the beeper sounds, indicating
the loss of proper source power. To reset, disconnect the battery to be charged and reconnect a
fully charged power source of 12–14 volts DC.
Charging 6/7-Cell Ni-Cd or Ni-MH Sub-C Car Packs
1. When power is supplied to the charger, the charger will beep and the charge status LED
will flash red momentarily.
2. Connect the included Tamiya charge lead to the charger. Attach the red (positive) wire of
the charge lead to the red (positive) terminal of the charger. Next, attach the black (negative)
wire of the charge lead to the black (negative) terminal of the charger.
3. Connect the battery to the charge lead. Once this is done, the charger will beep and the
LED will flash green until you begin the fast charging process.
4. Adjust the current rate to match the battery type. Charge sport packs and older batteries
at lower rates (below 3 amps). Higher quality (matched) battery packs can be charged at
higher rates to shorten charge times.
5. Push the Start button to begin the charge process. Once you have begun to charge the
battery pack, the beeper will sound once. The charge status LED will go from flashing to
solid green. The number of LEDs that will illuminate red will show you the rate at which you
are charging. (If there are no LEDs illuminated red, the charge rate is less than 1 amp, two
illuminated will show the charge rate is 2 amps, five illuminated means charge rate is 5 amps).
Caution: Once you have begun the charging process, do not increase/decrease the
charge rate. This will cause the charge status LED to go from solid green to flashing red for
10 seconds and will delay the fast charging process. This could also result in a false peak.
6. Once your battery pack has peaked, the charger will repeatedly beep, the LED will flash
green and the charger will automatically transition to trickle charge.
Charging 4/5-Cell Ni-Cd or Ni-MH Receiver Packs
1. When power is supplied to the charger, the charger will beep and the charge status LED
will flash red momentarily.
2. Connect the receiver battery charge lead to the charger. For some batteries, you may need
to use the included red BEC charge lead. Attach the red (positive) of the charge lead to the
red (positive) terminal of the charger. Next, attach the black (negative) of the charge lead to
the black (negative) terminal of the charger.
3. Connect the receiver battery to the charge lead. Once this is done, the charger will beep
and the LED will flash green until you begin the fast charging process
4. Select a charge rate below 2 amps, depending on what receiver pack that you are going to
charge. We recommend that you charge 600mAh receiver packs at 1 amp or less, while
higher capacity packs, such as 1000mAh, can be charged at 2 amps.
5. Push the Start button to begin the charge process. Once you have begun to charge the
battery pack, the charge status LED will go from flashing to solid green. The number of
LEDs that will illuminate red will show you the rate at which you are charging. (None of the
LEDs illuminated will show the charge rate is less than 1 amp, two illuminated will show the
charge rate is 2 amps).
Caution: Once you have begun the charging process, do not increase/decrease the
charge rate. This will cause the charge status LED to go from solid green to flashing red for
10 seconds and will delay the fast charging process. This could also result in a false peak.
6. Once your battery pack has peaked, the charger will repeatedly beep, the LED will flash
green and the charger will automatically transition to trickle charge.
Once your batteries are fully charged, the charger will automatically enter into trickle charge.
This feature allows your batteries to stay fully charged until you are once again ready to use
them. Trickle charging also helps “equalize” the battery voltage of the individual cells within a
pack. This raises the total battery pack voltage (power) and increases capacity (runtime). You
will know that your charger has entered trickle charge when you hear the charger beep and
the LED continuously flashes.
Once the battery pack has peaked and is in trickle charge, you can re-peak your battery by
simply pushing the Start button without disconnecting the battery from the charger. Once the
battery has re-peaked, the charger will return to trickle charge.
To calculate the charge times of a fully discharged battery pack, use the formula below.
Battery Capacity is equal to the charge time multiplied by the charge current. Batteries with
unmatched, damaged or unconditioned cells will have much shorter charge times.
Example:
Battery Capacity (amp/hours) = Charge Time (hours) x Current Rate (Amperes)
(600mAh/1000) .6A/hr = (36 minutes/60) .6 hour x (1000mA/1000) 1 amp
Introduction
Re-Peak
Operating Guidelines
Trickle Charge
Charge Times
