HEXFLY PRO-X4, Manual

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The typical purpose of discharge is to determine the residual capacity of the battery, or
to lower the voltage of the battery to a defined level. Much like the process of charging,
when you discharge batteries you must not leave the battery unattended. To avoid the
battery becoming over discharged, set the final discharge voltage correctly. Lithium
batteries should not be over discharged to lower than the minimum voltage, as this
leads to a rapid loss of capacity or a total failure. Generally, you do not need to
discharge a Lithium battery.
Some rechargeable batteries are said to have a memory effect. If they are partly used
and recharged before the whole charge is drawn out, they 'remember' this and the next
time they are used, they will only use the “remembered” part of their capacity. NiCd and
NiMH batteries are said to suffer from memory effect and prefer complete cycles. Fully
charge these batteries and then use until they’re empty. Do not recharge before storage;
allow them to self discharge during storage. NiMH batteries have less memory effect
than NiCd.
Lithium batteries should not be fully discharged. Read the manufacturer’s recommend-
ed minimum voltage and never allow the pack to drop below that voltage. Instead,
charge the battery more often or use a larger capacity pack.
A brand-new NiCd battery pack will not reach peak performance until the pack has been
cycled approximately 10 times. The cyclic process of charge and discharge will optimize
the capacity of the battery pack.