Acer S510 - Manual (Page 7)

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Align the tabs on the cover into the slots on the phone.
Gently press the cover until it snaps in place.
CAUTION: RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN
INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS ON
page 60.
Charging the battery
For initial use, you need to charge your smartphone for eight hours. After that you
can recharge the battery as needed.
Connect the AC adapter cord to the micro USB connector on your smartphone.
Removing the battery
Open the battery compartment as shown in "Installing the battery" on page 6. Lift
the battery out of the compartment by lifting at the bottom of the battery.
Replace the battery cover as described above.
Installing a SIM or microSD Card
To take full advantage of your smartphone’s telephony capabilities, you must install a
SIM card. The SIM card holder is located at the top of the battery bay.
Your new phone has two SIM card holders, you may install one or two SIM cards.