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01-13-2013 07:27 PM  8 years ago
Topic Vote0Post 1


Taupo , New Zealand

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Reciever battery or not
I have just bought a used T Rex 700, the previous owner did not run a separate battery for the receiver and servos but used his main batteries through a Gryphon Hyper HV Bec ( GSR-7075).
This Bec needs at least 3S battery to operate it.

Should I leave it as is or add the an independent battery for the receiver and servos. I would be running 2X6S batteries for my Mains.
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01-13-2013 07:32 PM  8 years ago


Minneapolis, MN USA

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In my experiences, if you're flying anything over a 450 it's best to have a separate power source for your electronics, it prevents brown outs and is a lot safer. Just my two cents.
01-13-2013 09:14 PM  8 years ago

rrElite Veteran

Western Wa

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Regardless of which method you use both have multiple single points of failure. If a reliable, correctly sized BEC is used, I see no advantage to running a separate receiver pack. However when you run a BEC you don't have to charge and manage the health of a receiver pack.

In recent years, I've heard more stories crashes caused by pilots forgetting to check the charge state Rx vs brownouts and BEC failures (at least when a reliable, properly sized BEC is used).

Rx pack seems like combination of holdover from the nitro days and some poor BECs and wiring jobs.

IMO the biggest advantage to an RX pack is cost. You can get LiPo4 Rx pack that plugs directly into the Rx for much cheaper than a decent BEC with equivalent current rating. However, if you are willing to spend the money on quality BEC, it does provide additional convenience.
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