Recharging the battery
JACK has a rechargeable Li-ion battery with no memory effect.
The burn-time data provided may vary up to +/-15% depending
on ambient temperature, device settings, applications installed,
version of the operating system, backlight settings, and usage.
m WARNING!
Always fully charge the battery before using the computer
the first time.
Charge the battery by connecting JACK to a USB wall charger
(not included) using the USB cable provided.
We recommend using a USB wall plug (like those for
smartphones/tablets) for charging JACK.
If you decided to use a USB port on a computer, make sure that
the computer does not suspend power when it switches to stand-
by mode. Charging JACK from a computer is not recommended
because the device might not charge fully.
Even if JACK's next-generation battery has no memory effect, we
still recommend charging the battery completely.
Average charging time is 3-5 hours depending on the residual
charge level.
m WARNING!
Never dive if the computer shows a charge of 30% or less.
When you connect the USB charging cable, within 45 seconds
the <= charging symbol will appear on the watch screen. Charging
is complete when the battery symbol disappears from the watch
screen and sleep mode activates.
Once the battery has charged, even if the device is left connected
to electrical power, JACK automatically interrupts the ow of
power. If you leave the computer charging longer than necessary
(e.g.,overnight),youmayndithasswitchedtosleepmode.
You can check the charge % of your JACK by pressing any button
on the watch screen.
Ifthechargecycledoesn'tnish,thebatteryindicatormightnot
be exact until the next full charge.
After installing an app or updating the operating system, we
recommend that you run a full charging cycle.
m WARNING!
Don't leave the JACK with a fully dead battery for a long time
(e.g. 6 months); this can damage the battery. JACK will
record an alarm if it is left uncharged for long periods, and
this eventuality is not covered by the guarantee.
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