TrakPower VR-1 Dual Racing Charger - Manual (Page 10)

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K. Re-peak Delay: This sets a time delay to occur between charge and discharge while cycling in
order to allow the battery to cool. The range is from 1-30 minutes. Press, then rotate the dial
to fi nd the amount of time for the delay. Re-press dial to confi rm setting.
4. DISCHARGE
Used to set discharge current, cutoff voltage, cutoff temperature and maximum discharge
capacity. Rotate the jog dial to locate the discharge icon, as shown left and press the > key to
enter discharge setup.
A. Discharge Current: To manually adjust, press the dial, then rotate to fi nd the desired discharge
current which ranges from 0.1A (100mA) to 10.0 amps. You should refer to your battery
manufacturer’s instruction manual for recommended discharge settings for your particular pack.
B. Discharge Cutoff: This is the voltage where discharging of the battery will stop, and is shown
as volts PER CELL in the pack (not total pack voltage). Press dial, then rotate to fi nd the correct
value. Re-press dial to confi rm setting.
i. Some NiCd and NiMH battery manufacturers rate the capacity (mAh) of their batteries
based on a discharge cutoff voltage of 0.9V per cell. So, to see if the battery is supplying
the amount of capacity as rated by the manufacturer, set the discharge cutoff voltage to
0.8 or 0.9V. This is also a good voltage for stopping discharge of “sub-C” size cells to
determine their useful run-time in minutes. However, for any “A”, “AA” or “sub-C” size
cells that are used to power radio transmitters or receivers, set the discharge cutoff
voltage to 1.1V per cell to get an idea of how long the battery will power the transmitter
and/or receiver. Most R/C receivers are not capable of maintaining control with a 4-cell
NiCd/MH battery that is discharged below 1.1V per cell. The adjustable range for NiCd
and NiMH batteries is 0.1 – 1.1V per cell.
ii. For Li-Ion/LiPo batteries, the adjustable range is 2.5 – 4.2V per cell. A setting of 3.2V per
cell is recommended.
WARNING!! Do not attempt to discharge a LiPo battery below its recommended cutoff voltage.
Doing so may cause a failure later when attempting to re-charge the battery, and result in FIRE!
C. Cutoff Temperature: Please refer to page 8 in the charge section.
D. Maximum Discharge Capacity: This is to set desired discharge percentage. If “OFF” is set, this
maximum capacity function is not activated. If battery capacity is 3000mAh and if you set 10%
out of the total maximum capacity, the charger should discharge 300mAh. It is recommended
that the maximum discharge capacity be turned OFF when discharging lithium type batteries.
5. CYCLE
Battery “cycling” is the process of fully charging then discharging a battery to a pre-determined
cutoff point or vice-versa. Cycling is ONLY recommended for NiCd and NiMH batteries (never
for lithium or lead-acid batteries). The VR-1 can perform anywhere from one to ten cycles
consecutively.
A. To cycle a Ni-XX battery, be sure the correct battery specifi cations are entered or correct model
memory has been selected.
B. Use the jog dial to locate the Cycle menu and press > to enter the setup.
C. Decide if you want the battery to be discharged fi rst (preferred if the battery is used often), or
charged fi rst (sometimes preferred if the battery is new or has not been used for some time).
D. To set the number of times the battery will be cycled consecutively, rotate the dial to “CYCLES”
and press to change the number of cycles from 1 to 10 times. Press to confi rm.
E. A time delay can be set to occur between the charge/discharge functions to allow the battery
to cool. This cycle time delay can be adjusted from 1 to 30 minutes. There is a separate delay
for the charge process (AF-CHG DELAY, “After-Charge Delay”) and discharge process (AF-DCH
DELAY) of the cycle.