If you notice that the autonomy of your Seac Jack/Guru is no more the one you expected make sure to follow step-by-step this tutorial.

How correctly recharge the Seac Jack/Guru.

> Plug the USB cable to a wall charger.
(e.g. the wall charger of your smartphone or tablet).



ATTENTION! Most PC and Mac with an advanced power management could stop the electric supply of the USB ports after a while.

The advanced power management of the PC and Mac may disturb the power management of the Seac Jack/Guru (the battery of the Seac Jack/Guru may appear to be completely charged, even if it is not).

The same power management system is used by some PowerBank system.
Use wall chargers only to recharge your Seac Jack/Guru.




> Check that the o-ring of the USB cable is on its place (see picture)
(The Seac Jack/Guru will not be able to recharge properly if the o-ring is missing).






> Plug the USB cable to the Seac Jack/Guru.

Plug the cable connector, make sure that the small protuberance on the cable head (blue in the picture) is placed as shown in the first picture below.

Gently turn the cable head as shown in the second picture below.






> Press one button to start the recharge immediately.

> Make sure that the battery icon is shown.






> Even if the Seac Jack/Guru has Li-Ion batteries without memory, we suggest to
recharge the Seac Jack/Guru at least for 5 hours.

> According to your Seac Jack/Guru setting, when the recharge is completed you will find the Seac Jack/Guru screen without the "battery is recharging" icon or with the screen turned off (it means that the "sleep mode" is active).

> Unplug the USB cable.