Correct Use and Maintenance of Drone Batteries


I. Don’t over discharge drone batteries.

A Fast drop of the battery voltage will lead to over discharge with bad control,
this will cause damage to the battery and could cause your drone to crash
due to the voltage becoming too low.
Each minute you save during the flight will save the battery one more cycle of life.
We recommend buying atleast one spare battery and never push it to the limit.
When low battery warning shows, flyers should land as soon as possible.

Spry+ Battery Flight

2. Don’t over charge drone batteries.

Please do not rely on the auto power off function on the chargers.
It can keep monolithic batteries charging with high voltage of 4.35 V to 4.2 V.
Aging components can also cause the same problem over a period of time.
Over charged drone batteries will cause poor battery life,
or cause explosion and fire in the worst case.

Therefore, to prevent lithium battery overcharge:

I. Use professional or manufacturer-made intelligent balance charger.

II. Accurately set the number of individual batteries in the battery pack.

III. Periodically test the single cell voltage of the battery pack to ensure
the voltage balance of the battery pack. You can buy a battery cell checker here.

battery fire

3. Do not store fully charged

Chemical properties of fully charged batteries are extremely active, and can not be stored for more than 3 days.
If a week passes without discharging it, there is a risk of gas leakage.
If the battery is not used after charging, discharge the battery to the single voltage
within 3 days with single cell voltage from 3.80 V to 3.85 V, which can extend the battery life.

4. Safe placement of drone batteries

Handle batteries with care.
The exterior of the battery pack is an important structure,
preventing battery explosion and leakage fire.
Damage of the exterior of the battery will directly lead to large self-discharge,
low voltage and risk of serious fire or explosion.
The battery should be handled gently when fixing the battery on the drone
and the velcro belt should be tight.
Do not charge and discharge in a high/low temperature environment.
Extreme temperature will affect the performance and life of the battery.
Before charging users should check whether the used battery has cooled down.
Do not charge and discharge in a cold garage, basement, direct sunlight or near a heat source.
The battery should be stored in a cool environment.
For long-term storage of the battery, the recommended ambient temperature is
10~25°C, dry and non-corrosive gas.

6. Safe transportation of drone batteries

Keep batteries away from collision and friction.
Transportation collision may cause short circuit of the battery external equalization line, which will directly lead to battery fire or explosion.
At the same time, the conductive material should be kept from contacting
the positive and negative electrode of the battery and short-circuit.
During transportation, it's best to put any spare batteries into a bubble bag
and put that into a separate box.

7. Voltage

When in use the voltage of a single cell is rated at 3.7v,
while the high-voltage cell is rated at 3.8v.
The actual voltage of a single lithium cell is 3.0-4.2v,
while the actual voltage of a high-voltage lithium cell is 3.0-4.2v.
The safe voltage is 3.0-4.35v.
Lithium batteries must be kept in this range.

If the voltage is lower than 3.0 V, it will cause slight discharge,
and if it is lower than 2.8 V, batteries will be excessively discharged,
which will cause the lithium battery to swell, internal chemical liquid will crystallize,
and the crystal may pierce the internal structure layer
and cause short circuit, and even drop the lithium battery voltage to zero volts.

When charging a single cell with voltage higher battery than
4.2 V or high voltage battery 4.35, which is defined as overcharging.
The fierce internal chemical reaction will cause the lithium battery to swell,
if it continues being overcharged, it will cause burning.

Be sure to use the manufacturer recommended charger.

A video of what happens when batteries aren't looked after!