User manual PowerXtreme X20/X30
E18-X20X30-EN00 www.emergoplus.com Page 4 of 25
1. Product description
The PowerXtreme X20/X30 is a Lithium-iron phosphate (LiFePO4) battery.
This is the safest of the most important lithium-ion battery types. Besides
safety, the LiFePO4 technology is characterized by:
▪ Minimal weight
▪ Small dimensions
▪ Low internal resistance
▪ High efficiency
▪ Excellent cycle performance
▪ Large permitted temperature range
▪ Almost constant Voltage throughout the entire discharge cycle
▪ It is possible to use 100% of the capacity before the battery is
empty and switches itself off. On the PowerXtreme X20 this is
20Ah and on the PowerXtreme X30 is this 30Ah. This is in contrast
to lead-acid batteries where usually 50 - 60% of the capacity can be
used before the battery needs to be recharged.
Which makes the X20/X30 battery the right choice for a wide range of
applications. Another big advantage compared to lead-acid batteries is that
the LiFePO4 battery does not need to be fully charged. A lead-acid battery
will fail due to sulphating if it is not fully charged for a longer period of time.
The PowerXtreme X20/X30 battery consists of 4 cells connected in series
with a nominal voltage of 3.2V which together form 12.8V.
Essential part of the LiFePO4 battery is its Battery Management System
(BMS). The BMS monitors the cells that make up the battery for the
following risks
▪ Too deep discharge - A LiFePO4 cell will fail if the voltage is less
than 2.5V. The BMS disconnects the battery before the cell voltage
reaches this point.
▪ Overvoltage - If the cell voltage exceeds 3.65V during charging, the
BMS will stop the higher voltage. The BMS stops the charging
process before the cell voltage becomes too high.
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