It's completely retarded. There are at least a half-dozen major battery connectors (for traction packs (7.2ish volt packs)) and it varies from country to country. If I had to take a guess I would say the old "Tamyia" plug is a standard for ground vehicles despite the fact that 80% of users cut if off and use something better. I use Ultra Deans, but they are not perfect, sometimes they oxidize/warp/wear out and they have a variable plugging force and can be difficult to plug in and unplug. Then Traxass [sic] had to throw a wrench in the works a few years ago with their new connector. It's a fine connector and all, but holy crap, not another one. And to boot their starter box wand thingie still uses a "Tamyia" type connector.

Somebody needs to form a "World Wide Commission to Unify these Dumb Connectors" group.

It's somewhat the same with "radio type" connectors, but there seems to be fewer options, thankfully. There is basically the newer Futaba ("J" I think) connector which has the little tab notch thingie on one corner of the plastic connector. And there is the "JR" type which is has chamfers (and on top of that there are at least two different size chamfers!) on it. You can trim either one to fit the other. I hate the JST deal, you can force one of these into a standard receiver, just make sure you have the negative and positive right, not a good system. And if you have an old Futaba G system I feel for ya, maybe this (without the bent pin) is what you want (and/or soldering skills with a does of X-acto wielding)?:



I usually just find the connectors I need and cut and solder the wires, just make sure you don't produce "hard-point" (which is basically impossible) in the wire that will fatigue and break with time and vibration. Use good shrink wrap/tape and make sure the connection is not allowed to flop around in the car.

Then there is the whole wiring deal, which I'm not entirely sure of. That may be from years past where Airtronics had some wires flipped around. Not to mention the whole positive/negative shift thing, oh don't get me started...

Somebody needs to be slapped.