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Question:

LED flashlight batteries instead of cell phone batteries

LED flashlight batteries instead of cell phone batteries

Answer:

Can you LED this flashlight, if the original is the use of a small battery, the voltage is generally about 4V, while the voltage is 3.7V mobile phone battery is fully charged when, 4.2V can be directly substituted.
Agree with the upstairs view, LED flashlight battery voltage between 3.7-4.2

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