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source. is a portable battery pack that uses 4 pieces AA or AAA rechargeable batteries. Due to the nature of the current smartphones in the market, running out of power is becoming a common issue. The need for a portable power source has become a necessity for long trips due to the lack of access to a power point. By using a USB cable, source. can be used to charge any android devices and Apple.
The indicator light on source. indicates the power left in. An integrated plug can be deployed to charge the batteries within source.. Alternatively, the batteries can be replaced to provide a temporary source of energy for charging.
National University of Singapore