TrakPower VR-1 Dual Racing Charger - Manual (Page 4)

4
Important Precautions
• Do not leave the charger unattended while in use.
• Disconnect the battery and remove input power from the charger immediately if the charger
or battery becomes hot!
• Do not attempt to charge incompatible types of rechargeable batteries as permanent
damage to the battery and charger could result.
• Do not use automotive type battery chargers to power the charger.
• Do not allow water, moisture or foreign objects into the charger.
•
Do not block the fans or intake holes, which could cause the charger to overheat.
• Do not attempt to use the batteries with more cells or total voltage than listed in the
specifi cations.
• Do not overcharge batteries as permanent damage could result. Do not use a charge current
rate which exceeds the safe level of the battery.
• Do not place the charger or battery on fl ammable surfaces or near combustible materials
while in use, such as carpet, cluttered workbench, paper, plastic, vinyl, leather, and wood,
inside an R/C model or full sized automobile!
• Allow the charger and battery to cool down between charges.
•
Always disconnect the charger from the power source when not in use.
Glossary of Terms
Amps (A): The unit of measure for charge current.
Milli-Amps (mA): A unit of measure for current, being amps (A) multiplied by 1000 and listed as
“mA”. So 2.5A is the same as 2500mAh (2.5 x 1000). Or, to convert mA to Amps, simply divide the
number by 1000. So 25mA is the same as 0.025A (25 divided by 1000).
Capacity and milli-amp hours (mAh): The amount of energy a battery can store is called its
capacity, which is defi ned as how much current a battery can supply constantly over one hour of
time. Most hobby batteries are rated for capacity in “mAh” or milli-amp hours. A 650mAh battery
can deliver 650mA of current for one hour (650mAh x 1 hr = 650mAh). A 3200mAh battery can
deliver 3200mA (3.2A) of current for one hour (3200mA x 1hr = 3200mAh), etc.
“C” Rating: Capacity is also referred to as the “C” rating. Some battery suppliers recommend
charge currents based on the battery’s “C” rating. A battery’s “1C” current is the same number as
the battery’s rated capacity number, but noted in mA or amps. A 600mAh battery has a 1C current
value of 600mA, and a 3C current value of (3 x 600mA) 1800mA or 1.8A. The 1C current value for
a 3200mAh battery would be 3200mA (3.2A), etc.