YUNEEC H850 Operation Manual page 84

You must always charge the Li-ion battery in a safe, well-ventilated area away from flammable
materials.
Never charge the Li-ion battery unattended at any time. When charging the battery, you must
always remain in constant observation to monitor the charging process and react immediately to
any potential problems that may occur.
After flying/discharging the Li-ion battery you must allow it to cool to ambient/room temperature
before recharging.
To charge the Li-ion battery you must use only the included charger or a suitably compatible Li-
ion battery charger. Failure to do so may result in a fire causing property damage and/or serious
injury.
If at any time the Li-ion 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.
Do not over-discharge the Li-ion battery. Discharging the battery too low can cause damage to
the battery resulting in reduced power, flight duration or failure of the battery entirely. Li-ion cells
should not be discharged to below 3.0V each under load.
Store the Li-ion battery at room temperature and in a dry area for best results.
When charging, transporting or temporarily storing the Li-ion battery the temperature range
should be from approximately 40–120 ° F (5–49 ° C). Do not store the battery or aircraft in a hot
garage, car or in direct sunlight. If stored in a hot garage or car the battery can be damaged or
even catch fire.
Never leave batteries, chargers and power supplies unattended during use.
Never attempt to charge low voltage, ballooned/swollen, damaged or wet batteries.
Never allow children less than 14 years of age to charge batteries.
Never charge a battery if any of the wire leads have been damaged or shorted.
Never attempt to disassemble the battery, charger or power supply.
Never drop batteries, chargers or power supplies.
Always inspect the battery, charger and power supply before charging.
Always ensure correct polarity before connecting batteries, chargers and power supplies.
Always disconnect the battery after charging.
Always terminate all processes if the battery, charger or power supply malfunctions.
General Safety Precautions and Warnings
WARNING: Failure to use this product in the intended manner as described in the quick start
guide and instruction manual can result in damage to the product, property and/or cause serious
injury.
A Radio Controlled (RC) multirotor aircraft, APV platform, drone, etc. is not a toy! If misused it
can cause serious bodily harm and damage to property.
WARNING: As the operator of this product you are solely and wholly responsible for operating it
in a manner that does not endanger yourself and others or result in damage to the product or the
property of others.