BETAFPV 01020010, User Manual

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Two batteries can be charged at the same time. Charging a fully discharged battery
takes approximately 20 minutes. WWhen the charger is not connected to a USB cable
and connector, inserting the battery to the TEST port of the charger can display the
current battery level. The number of 4.25-4.35 represents a fully charged battery while
3.30 or lower indicates a low battery.
Output 5V
Charging
4.25-4.35, Full Charged
<3.30, Low Power
TEST
Voltage Test Port