Reference
Notes on Using the AC Adapter
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Use the AC adapter supplied with your tablet or a genuine Sony AC adapter. Do not use any other AC adapter as it may cause malfunctions.
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Do not connect the AC adapter to a power conversion device such as a travel power converter. Doing so may cause overheating or a malfunction.
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Do not use a damaged AC power cord (mains lead) or USB cable for Multi Port to connect your tablet with the AC adapter.
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