E-FLITE Blade MCX S300 Instruction Manual - page 5
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•Storethebatteryatroomtemperatureinadryareaforbestresults.
•Whentransportingortemporarilystoringthebattery,thetemperaturerangeshould
be from 40–120 degrees Fahrenheit. Do not store the battery or model in a car
or direct sunlight whenever possible. If stored in a hot car, the battery can be
damaged or even catch fire.
• Do not over-discharge the Li-Po flight battery. Discharging the battery
too far below recommended voltage level can cause damage resulting in
reduced power and duration, or failure of the battery entirely.
Li-Po cells should not be discharged to below 3V each under load. In the
case of the 1S Li-Po battery used for the Blade® mCX S300, you will not
want to allow the battery to fall to below 3V during flight.
The Blade mCX S300’s 5-in-1 control unit features a soft Low Voltage
Cutoff (LVC) that occurs when the battery reaches 3V under load. When
the soft cutoff occurs, the ESCs of the 5-in-1 unit will reduce power to the
motors (regardless of the power level you have set with the throttle stick)
in order to prevent the voltage of the battery from dropping below 3V. This
reduction in power usually requires that you land the model immediately, at
which point you should power down the model and unplug the flight battery.
And while it is possible to power the model up and to fly again after the
soft LVC occurs, this is NOT recommended as continued discharging to
the soft LVC will cause permanent damage to the Li-Po battery resulting in
lost power and duration when using the battery for subsequent flights, or
failure of the battery entirely. Continued attempts to further discharge the
battery may also result in loss of control while the motor is running as the
voltage of the battery may drop below the minimum operating voltage of
the receiver and other electronics.
Also, it is not recommended that you fly to the soft LVC every time you fly.
Instead, you should be aware of the power level of the battery/helicopter
throughout the flight, and if at any time the helicopter begins to require
more throttle than typical to maintain hover or flight, you should land the
helicopter immediately. Routinely discharging the battery to the soft LVC
can still cause permanent damage to the battery.
Note: When the battery power/voltage is getting low you will typically find
that significant rudder trim and/or rudder stick adjustments are
needed to prevent the helicopter from spinning. This usually occurs
before soft LVC, and indicates a good time to stop flying.
If you have any further questions or concerns regarding the handling, charging and/
or use of the included Li-Po battery pack, please contact the Horizon Support Team
at 877-504-0233.
Battery Charging
It is important that you only charge the included 1S 3.7V 110mAh Li-Po Battery
(EFLB1101S) with the included 1S 3.7V DC Li-Po Charger (EFLC1003). Attempting to
charge the battery using another Li-Po charger or non-Li-Po-compatible charger could
result in serious damage. Please familiarize yourself thoroughly with the Battery
Warnings and Guidelines section before continuing.
Please follow these steps to charge the Li-Po battery with the included charger.
•Removethecoveronthebottomofthechargerandinstallfouroftheincluded
AA batteries, noting proper polarity. Replace the cover after the AA batteries are
installed.
•Slidethebatteryintotheslotonthecharger.Theendcapofthebatteryhasbeen
specifically designed to allow the battery to slide into the slot easily one way
(usually with the label on the battery facing outward) to prevent reverse polarity
connection. However, please be sure to check for proper alignment and polarity
before proceeding to the next step.
•Gentlypressthebatteryanditsconnectorintothechargejack/connectorlocated
at the bottom of the slot on the charger. Again, be sure to check for and to
achieve proper polarity before making the connection.
•Afteryoumaketheconnectionsuccessfully,theLEDlightonthechargerwillturn
solid red, indicating that charging has begun.
•Itwilltakeapproximately30–40minutestochargeafullydischarged(notover-
discharged) battery. As the battery nears full charge, the LED light will begin to
blink. When the battery is fully charged the LED light will blink approximately every
20 seconds or will go out entirely.
Note: The Li-Po battery included with your Blade mCX S300 will arrive partially
charged. For this reason the initial charge may only take 15–20 minutes.