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27.0-28.0V/35-40A power supply for maximum input/output power, before the charge process has
started you will be able to set the charge current rate to 20.0A max. However, if the battery is
currently at more than 20.0V the charger will then adjust the current rate automatically between 20.0A
and approximately 15.8A as needed to ensure it does not exceed the 400W maximum output power
level of each port. And when the battery nears/reaches the end of the Constant Current (CC) phase
of the charge around 25.2V (4.2V per cell) the current rate will reduce accordingly throughout the
Constant Voltage (CV) phase of the charge process and until the charge is complete.
Also, after the charge process has started (and if you have not already set the charge current
rate to the maximum rate possible) you can actually increase the charge current rate by up to
25% (i.e. – from 10.0A to 12.5A) or to the maximum charge current rate possible based on the
actual voltage of the battery and power level of each port; whichever comes first .
To do this,
simply press the ENTER button once immediately (or any time) after the charge process has been
started (and the ‘Battery Check Please Wait…’ check is complete) and the current rate will begin to
flash. You can then use the + button to increase (or the – button to decrease) the current rate
accordingly.
These details in mind, please also see the chart provided separately for a quick reference of the
maximum output power levels/charge current rate settings for LiPo batteries based on the listed input
voltage and current (and please note that these values are approximate and may vary +/- slightly
depending on the input voltage, output current, power level of the power source under load, ambient
temperatures, state of charge/voltage level of the battery being charged, etc.).
Balancing ON/OFF (for LiPo/LiIon/LiFe batteries)
As noted in further detail in the
BALANCER CONNECTIONS
section of this manual, the TP820CD is
equipped with built-in balancers for LiPo/LiIon/LiFe (A123) cells/batteries and
you should ALWAYS
use the balancers when charging LiPo/LiIon/LiFe batteries for maximum safety and battery
performance/longevity.
The balancers, working in conjunction with the charger, perform functions
similar to the safety circuits found in the LiPo/LiIon/LiFe cells/batteries for cell phones, laptop and
other electronic devices
to prevent over-charging that can result in fire causing damage and/or
personal injury.
They do this by ensuring
the voltages of cells within LiPo/LiIon/LiFe batteries are
closely equalized/balanced by discharging the higher voltage cells to closely match the lower voltage
cell(s) in the battery. This prevents over-charging any cell(s) that may have a higher voltage during
the charge process, or, in the event that the balancer cannot balance the cell(s) in time to prevent
exceeding the ‘CHG End Voltage’ setting (for any cell), the charger will automatically reduce the
charge current rate and/or end the charge process entirely as needed.
The balancers can also further ensure that you’ve set the cell count correctly, and as a result
we strongly recommend keeping the balancing turned ON at all times. Please also note that
when balancing is turned ON you MUST connect the balance connector of the battery to the
balance connector adapter board (which must be connected to the balancer/charger) BEFORE
you start the charge process otherwise you’ll encounter a Battery Type Error warning.
However, if you understand the associated risks, accept full responsibility and choose to charge
LiPo/LiIon/LiFe batteries without balancing/using the built-in balancers, it is possible to turn the
balancing OFF.
To turn the balancing ON/OFF, while on the Charge Mode screen simply press the ENTER button six
times. The balancing status will begin to flash and you can use the +/– buttons to turn it ON or OFF.
After turning the balancing ON or OFF per your preference you can press the ENTER button to select
the other adjustable values, or wait approximately 5 seconds until the status stops flashing to begin
the charge process or to scroll through the other modes.
