Terminology - Skyrc T400Q Instruction Manual

Terminology

The voltage at which the battery's charge limit (capacity limit) is reached. The charge process
switches from a high current to a low maintenance rate (trickle charge) at this point. From this point
on further high current charging Would cause overheating and eventual terminal damage to the
pack.
Final Discharge Voltage
the voltage at which the battery's discharge limit is reached. The chemical composition of the
batteries determines the level of this voltage. Below this voltage the battery enters the deep
discharge zone. Individual cells within the pack may become reverse polarized in this condition,
and this can cause permanent damage.
A, mA
Unit of measurement relating to charge or discharge current.1000 Ma = 1 a
(a=ampere,ma=milliampere)
Ah, mAh
Unit of measurement for the capacity of a battery (amperes x time unit; h = hour). If a pack is
charged for one hour at a current of 2 a, it has been fed 2 ah of energy. It receives the same
quantity of charge (2 ah) if it is charged for 4 hours at 0.5 A, or 15 minutes (=1/4 h) at 8 a.
C-rating
Capacity is also referred to as the 'C' rating. Some battery suppliers recommend charge and
discharge currents based on the battery 'C' rating. A battery's '1C' current is the same number as
the battery's rated capacity number, but noted in mA or amps. A 600mAh battery has a 1C current
value of 600mA, and a 3C current value of (3 x 600mA) 1800mA or 1.8A. The 1C current value for
a 3200mAh battery would be 3200mA (3.2A).
Nominal Voltage(V)
The nominal voltage of the battery pack can be determined as follows;
-.NiCd or NiMH: multiply the total number of cells in the pack by 1.2. A 8-cell pack will have a
nominal voltage of 9.6 volts (8x1.2).
-.LiPo: multiply the total number of cells in the pack by 3.7. A 3-cell LiPo wired in series will have a
nominal voltage of 11.1 volts (3x3.7).
-.LiIo: multiply the total number of cells in the pack by 3.6. A 2-cell LiIo wired in series will have a
nominal voltage of 7.2 volts (2x3.6).
-.LiFe: multiply the total number of cells in the pack by 3.3. A 4-cell LiIo wired in series will have a
nominal voltage of 13.2 volts (4x3.3).
-.LiHV: multiply the total number of cells in the pack by 3.7. A 4-cell LiIo wired in series will have a
nominal voltage of 14.8 volts (4x3.7).
If the nominal voltage of the battery is not printed on the battery's label, consult your
battery manufacturer or supplier. Do not guess the rated voltage of battery.
SKYRC T400Q Instruction Manual
.23 SKYRC T400Q