A cell phone charger can charge two cell phone batteries do

Users questions: I want the phone to make a flashlight battery, a charger like to know can charge two batteries, ah, if the electric current to allow you to use, the charger will not burn it, thank you for the
Experts answer: charging when you are in series or parallel? If the series, no. Because the voltage has failed. If it is parallel to To charge. However, very long time. Because the voltage is reached. But the current is small. Such as the original charge time 4 hours, and now two parallel can only charge 8 hours. (And battery capacity must be the same.)
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