Battery Warnings
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IMPORTANT NOTE: Lithium Polymer LiPo) batteries are significantly more volatile than the alkaline , NiCd
and NiMH batteries also used in RC applications. All instructions and warnings must be followed exactly to
prevent property damage and/ or personal injury as mishandling of LiPo batteries can result in fire.
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By handling, charging or using the included LiPo battery you assume all risks associated with LiPo batteries. If
you do not agree with these conditions, please return your complete product in new, unused condition to the
place of purchase immediately.
You must read the following safety instructions and warnings before handling, charging or using the LiPo
battery.
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• You must charge the LiPo battery in a safe area away from flammable materials.
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• Never charge the LiPo battery unattended at any time. When charging the battery you should always remain
in constant observation to monitor the charging process and react immediately to any potential problems that
may occur.
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• After flying / discharging the battery you must allow it to cool to ambient / room temperature before
recharging. Also, it is NOT necessary or recommended to discharge the battery ‘completely’ before charging
( LiPo batteries have no ‘memory’ and it’s safe to charge partially discharged batteries when using an
appropriate charger and settings).
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• To charge the battery you must use only the stock included Charger or a suitably compatible LiPo battery
charger. Failure to do so may result in a fire causing property damage and/ or personal injury. DO NOT use a
NiCd or NiMH charger to charge Li-Po battery.
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• If at any time during the charge or discharge process the battery begins to balloon or swell, discontinue
charging or discharging immediately. Quickly and safely disconnect the battery then place it in a safe , open
area away from flammable materials to observe it for at least 15 minutes. Continuing to charge or discharge
a battery that has begun to balloon or swell can result in a fire. A battery that has ballooned or swollen even
a small amount must be removed from service completely.
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• Store the battery partially charged (approximately 50% charged/3.85V per cell), at room temperature
(approximately 68–77° Fahrenheit [F] ) and in a dry area for best results.
• When transporting or temporarily storing the battery, the temperature range should be from approximately
40–100°F. Do not store the battery or model in a hot storage car or direct sunlight whenever possible. If
stored in a hot garage or car the battery can be damaged or even catch fire.
• Do not over-discharge the LiPo flight battery. Discharging the LiPo flight battery to a voltage that is too low
can cause damage to the battery resulting in reduced power, flight duration or failure of the battery entirely.
• LiPo cells should not be discharged to below 3.0V each under load. In the case of the 2-Cell/ 2S 7.4V LiPo
battery used to power the plane you will not want to allow the battery to fall below 6.0V during flight.
The included ESC features a ‘soft’ low voltage cutoff ( LVC ) that smoothly reduces power to the motor
(regardless of the power level you have set with the throttle stick) to let you know the voltage of the battery is
close to the 6.0V minimum.
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However, even before this reduction in power , if you find that more than the typical amount of throttle/ power
is required to cruise or climb you should land the model and disconnect the battery immediately to prevent
over-discharge.
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And while it is possible to continue flying the model after the soft LVC occurs, this is NOT recommended.
Continued discharging can result in reaching the 5.0V ‘ hard’ LVC which may cause permanent damage to the
LiPo battery resulting in reduced power and flight duration during subsequent fights ( or failure of the battery
entirely which is not covered under warranty).
RANGER EX — Professional FPV Platform
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Summary of Contents for RANGER EX
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