6
Warning and Safety Notes Continued
Charging
Before charging your batteries, it is critical that you determine the maximum allowable charge rate for
your batteries. The RDX2 Mini is capable of charging at high rates that may not be suitable or safe for your
particular batteries. For example, Lithium cells are typically safe to charge at 1C, or the total mAh÷1000.
A 1200mAh battery would have a 1C charge rate of 1.2 amps. A 4200mAh battery would have a 1C charge
rate of 4.2 amps. Some manufacturers are o ering Lithium cells that can be charged at greater than 1C but
this should ALWAYS be veri ed before charging a Lithium battery at rates higher than 1C.
Voltage is just as critical as the charging amperage rate and this is determined by the number of cells
in series, or “S”. For example, a 3S LiPo is rated at 11.1 volts (“S” multiplied by a single LiPo cell with a
nominal voltage of 3.7 volts DC. 3 cells x 3.7 volts each equals 11.1 volts DC).
Connect the battery’s main leads to the charger output: red is positive and black is negative. Keep in
mind that the gauge or thickness of your charging leads from the RDX2 Mini to your battery must be of
an acceptable current rating to handle the applied charge current. For maximum safety and charging
e ectiveness, always match or exceed the main battery lead rating when assembling or selecting your
charging leads. If you charge a battery at a high current rate (amperage) with a charging lead not rated for
the chosen amperage, the wire could get hot, catch re, short out and/or potentially destroy your battery
and the charger.
When in doubt, always use a higher gauge wire (lower AWG number). It is common
to see charging leads constructed of 14AWG, 16AWG or 18AWG wire. Always refer to
recommendations from your battery manufacturer for your speci c battery type and size
before initiating a charge or discharge process.
Do not attempt to disassemble or modify Lithium or Lead-Acid battery packs.
BATT. Type | Stop Button
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