Please be advised: UPS Shipping will take more time to be shipped as packages need to be taken to a UPS store which is not done every day. Please select USPS for a faster shipping turnaround.
On Paper: Considerations for Selecting a Power Source
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Batteries should be used only if the device is absolutely not able to be plugged into the wall (may need to be mobile) because the energy that is used in batteries is very costly. Electricity coming from the wall is very inexpensive in relation to the batteries.
