Elitegroup U41II - Manual (Page 17)

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and oil. In case you decide to pull over for roadside computing, try
to choose a clean, comfortable work area for your system.
A lithium-ion battery pack will be available when you are traveling.
If you are running your system for the first time on battery power,
remove the battery from the package, install it into the system and
recharge the battery to fully prepare for service.