EZA COMB-E Guide D'utilisation page 28

Connect with extension battery
The portable power supply system contains a new external pack expansion port.
You can now buy an external battery pack to use with your system. Whenever connected, it
functions as if you had two internal batteries.
Outputs will drain the external pack first. Once the external pack is empty, it will immediately switch
to using the internal battery.
When charging, your unit will fill its internal battery first. When the internal battery is full, it will
immediately switch over and start charging the external pack. Please be noted the external battery
couldn't be charged via the unit internal battery; If you need charge the external battery, you need
connect a charging source;
The Portable power system could connect with any 12V battery (AGM, Lithium, Lead Acid); the
charge voltage for external battery is 14.2V, if you use it to charge A lithium battery, it can't be
charged fully.
EXPENDABLE BATTERY PORT
FOR BATTERY TYPE ENERG-E100