This module is an external DC-DC booster; it draws DC voltage from 1S Li Po battery, boosts it to 6V for your receiver & servo, and keeps providing the stable output current of 3Amp or above. As the BEC voltage of 1S Li Po, which used by 1/12th scale race cars, usually goes below 4.2V and causes the receiver and servo to work abnormally, so a separate battery is needed to power the receiver. This booster can work as a receiver battery and save you the trouble of battery charging and maintenance.
Royal mail at £3.50, or Express at £6.95.
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