Common Electric Terms
In the US, a standard socket provides 120
volts and alternates the direction of the
current 60 times per second.
Current Direct current flows in only one direction.
The Hitec X1 Touch AC/DC charger is a 55-watt touch-screen charger that
is capable of charging one- to six-cell LiPo batteries.
The Hitec universal balancing board, supplied
with the X1 Touch, supports all four types of
balancing plugs. Other chargers might come
with up to four smaller boards.
The XH balance connector has
become the most common connector
found on batteries in the US. E-flite
and ElectriFly are examples of brands
that use this plug.
Chargers receive power from alternating current (AC),
direct current (DC), or have the option to use either one.
An AC charger has a built-in power supply, allowing it to
be plugged into a wall socket. This makes it handy to charge
batteries anywhere there is an available outlet.
DC power comes by either plugging the charger into
a power supply or by connecting it to a battery. This is
convenient for charging at the field or at events when
electrical outlets are unavailable.
Chargers are typically rated in watts.
Watts are calculated by multiplying the
voltage and the amps. A fully charged
2,200 mAh 3S LiPo battery would
have a voltage of 12. 6. Charging at
1C, it would draw roughly 28 watts
of power ( 12. 6 volts x 2. 2 amps = 27. 72 watts). As you
might expect, charging at a higher C rating will increase the
wattage required from the charger.
Single and Multiport Chargers
Multiport chargers allow two or more batteries to be
connected to the charger and simultaneously charged. The
only drawback is that the separate ports on the charger split
the available wattage, so a four-port charger might only
support 50 watts per channel versus 200 watts that might be
supported on a single charger.
Balance charging LiPo batteries is essential to
getting the most from your batteries by ensuring
that the voltage of each individual cell in a pack is
equal. Balancing helps prevent single cells from being
overcharged or discharged, which can damage the cell
and has the potential to cause a fire.
The balancing process will typically discharge the
higher-voltage cells to match the lower-voltage cells
during the charging process. Balancing can also
be done with stand-alone products such
as the Astro Flight Blinky LiPo
LiPo batteries composed
of two cells or more
could utilize one of four
balancing connectors: XH,
EH, HP/PQ, and TP. Some
chargers include one or more balancing boards
and some have all four on one board. If your charger doesn’t
have the balancing connector
to match your batteries, you
can probably purchase one.
have a primary
46 Model Aviation SEP TEMBER 2015 www.ModelAviation.com