FT Tiny Trainer / power pack A question JST connector


I have been watching the minis series and I noticed that they use a JST connector for the battery leads. I need to make an adapter. What is the standard, JST male on battery or JST Female on the battery?


Hostage Taker of Quads
Staff member

I hate to say it, I've seen vendors quote it both ways :p

Most common is male = battery . . . which also is the one that has female contacts. No respect for the gender of electrons :eek:

Overall lesson . . . don't buy without a good pic from the vendor.


Skill Collector
With all power connectors think "the exposed metal points to the power" - similar to a wall socket and tea pot cord. This is the safest to prevent shorts.

Good luck!!


Tim Brown

New member

20151124_194424.jpg 20151124_194449.jpg 20151124_194454.jpg I use one of these
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Posted a thousand or more times
As has already been stated, a power source like a battery should always have the electrically female connector, the one with holes (aka socket, receptacle) . The electrically male connector, the one with the pins or plugs should go on the power consumer. For example batteries with XT60 connectors have female connectors (holes) and male adapters (pins) that plug into them.

Generally, connectors are sexed by they electrical connection. This is the only convention that makes any sense because that is the important thing to know.

However for some reason the little red JST RCY (aka BEC) connectors seem to be referred to by the sex of their sheathing. So the batteries with these connectors have "male" connectors and "female" adapters even though the electrically female socket, the one with the holes, is the one on the battery (or should be).

Hobby kink at least is consistent about putting the electrically female connectors on their batteries at least as far as what is pictures and what I have received but they call the XT60 female and the red JST RCY "male" even though its really electrically female.

I was perplexed by this and looked around and it seems that this cross-dressing is the norm for the Red JST RCY connectors at least in RC circles. Go figure.

Tim Brown

New member

It is based on the housing not the pins..the xt60 battery connector goes into the esc connector so it is considered male


I know I am goping to catch a ton of flack for this but WS Deans plugs are very easy to tell the male from the female.


Posted a thousand or more times
It is based on the housing not the pins

Only for the JST RCY connector in RC circles...

the xt60 battery connector goes into the esc connector so it is considered male

No idea what you mean by that. The male end of that adapter plugs into the female XT60 connector on a battery and the ESC plugs into the female end.

I have no idea why they put a female (ie electrically male) JST RCY connector on that adapter for a BEC. It should be electrically female. Anything you should plug into it should have pins not sockets... So it's a badly made adapter imo...an example of why it is a bad idea to sex a connector by it sheath and not its electrical connection since whoever made it was confused.

If you look at the BEC HK sell they either have no power connector or if they have JST RCY connectors, they are female (ie electrically male) and won't work with that adapter.

and its not just HK. Here are some other random examples