Hello,
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no,this GPRS Shoield is only newer version as far as i read! U need to put an battery inside. do not know why, but without was not working. the battery in the rtc timer keeps the clock working when power is disconnected.
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no, should make no difference.For testing you need only connect the ardiuno to power!
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Timer connection to arduino:
SCL = A5
SDa = A4
VCC = VCC
GND=GND