Cells Characteristic parameters
Ni-Cd Ni-MH Pb-bat RAM Li-Ion Li-Pol Li-Ta Li-Ph
Name nickel-
cadmium
nickel-
metal-
hydride lead-acid alkaline lithium-ion lithium
polymer lithium
tadiran lithium
phosphate
Voltage 1,2V 1,2V 2V 1,5V 3,6V 3,7V 3,0V 3,3V
Discharging
voltage 0.9V 1,0V 1,8V 1,0V 3,0V 3,3V 2,4V 2,8V
Max. charging
voltage 1,85V 1,85V 2,45V* 1,65V* 4,1V* 4,2V* 3,45V* 3,65V*
Charging current 0,2 – 2C
max 4C 0,2 – 1C
max 2C 0,1 – 0,4C 0,2 – 1C 0,1 – 1C 0,1 – 1C 0,1 – 0,4C 1-4C
no. of cells 1 - 32 1 - 32 1 - 18 1 - 26 1 - 12 1 - 12 1 - 12 1 - 14
*- it can be reduced by 200mV with 10mV step
Where C is capacity of battery (1C for 2400mAh capacity is equal to 2,4A current)
Values shown in the table are characteristic for particular types of cells, but it is recommended to check which
parameters are admissible by producer of the cell. Ex. to charge propulsive Ni-MH cells with 2C circuit battery needs
to be cooled. Using inflex mode highly decrease heat diffusion at late charging process. Generally propulsive cells
(which small internal resistance) could be charged with higher circuit. Cells which are used with transmitter/receiver in
RC devices should be charged with maximum 1,2A circuit. That restriction come off thickness of the wires used with
that packets and construction of battery containers.
Ni-Cd, Ni-MH – The memory occurrence which appears in that cell types needs full discharging battery before
charging process. That discharging process (Auto mode) should be done every 5 – 10 charges. One Format cycle with
Regen function will give good effects.
Formatting new packets should be done with 0,2 – 0,3C (3 – 5 format cycles)
Regeneration of the packed should be done in 3 – 5 cycles with 0,2 – 0,5C (Format, Regen - on).
Li-Ion, Li-Pol – each cell in packets could be parallel (to extend maximal circuits and capacities) and then serial
connected to receive suitable voltage. Number of cells set up at charger is equal to the number of serial connected cells.
For example for 2P3S packet (2 parallel and 3 serial connections) 3 cells should be set up. Cells (or groups of parallel
connected cells) in the time of using could be discharging in various measure. That leads to considerable decreasing of
cell capacity. Following discharging/charging cycles increases that occurrence. At the extreme cases this could damage
or even auto-ignite the packet. To avoid that danger voltage at every cell should be measured time to time. When the
differences in charged batteries are greater than 0.1 V it is recommended to charge each cell separately with maximal
0.5 C circuit and turned off Fast mode. It is possible to do 1 – 2 Format cycles with active Regen mode for each cell
separately.
Regeneration of whole packets (Format, Regen – on) make sense only when calls are equated. This mode could
improve parameters of used packet, but not as that range as regeneration of Ni-Cd packets. For some Li-Ion packets it
is advised to charge them to 4,2V each cell. In that case you must charge Li-Ion packets in Li-Pol program.
Li-Ph (Li-Ion FePO4)
Pulsar EQUAL (communication with Equalizer from Elprog)
A balancer/equalizer balances the cells voltage of Li-Xx packs. A communication between Pulsar EQUAL and Pulsar
2 makes it possible that the charge current will be if needed reduced or cut off. You will find details in the manual from
Pulsar EQUAL.
