how does a 2 amp charger cause overvoltage?
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Great question.
I use a two amp charger regularly and monitor the charging voltage and amperage with an inline volt/amp meter. The voltage is usually 5V. I understand that a 2A charger is capable of 2A but the amperage is regulated by the watch to about .45A. If you can’t monitor it I would use a 1A charger or less. Even though a 1A charger can overcharge a watch if the regulator fails.
Dude Tom means u need to buy a new battery for the watch it happened to my Android 5 and it does not recover it gets destroyed