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Old Jul 31, 2007, 07:20 PM
magee8578 is offline
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Question

Battery Leads! Bullets Vs. Deans?


I am new to LIPOs and trying to determine what type of connectors to use on my battery packs. Does anyone have any thoughts on Bullet connectors vs Deans connectors?
Also, if you go with Deans what is the maximum size battery you would use micro dean connectors on?
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Old Jul 31, 2007, 07:35 PM
Kenny Sharp is offline
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turn, turn, turn.
Search the High Performance Forum and there is a good thread on just this subject.

Deans are good for at least 150 amps on a burst.
North of 230 amps, 6mm. bullet connectors do the job well.

AFAIK from personal experience using Deans Ultra, 10s and 90 amps was no problem for me.
Old Jul 31, 2007, 07:55 PM
Challenger 413 is offline
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I use Deans Ultra up to 5S and 48 amps, thats the biggest plane to date. I use little bitty JST on 5 amp and below, everything else gets a Deans.

If you decide to use them, pick up a small bottle of powdered graphite (Lock Lubricant) and sprinkle some in the female, dump it out, makes taking them apart soooo much easier. A small bottle will last a long. long time.

Challenger413
Old Aug 01, 2007, 10:31 AM
Condre' is offline
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No bullet connectors for batteries. The beauty of Deans is that you can't cross-polarize with them. If the connectors don't preclude that, then it's going to happen eventually. Like last week when I smoked a brand new 3s after its first cycle.
Old Aug 01, 2007, 12:40 PM
Hughes500Bob is offline
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You could also use APP Powerpolls .... but need a $50 crimper for them (no solder required). I use Deans Ultras and Deans Micros as they seem to be the most common.... and I can solder very well.
Old Aug 01, 2007, 02:44 PM
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I like bullet connectors for parkflyers just because they are easier to stuff into the often cramped confines of a parkflyer fuselage. My Flashback is a prime example. Deans are great when you have room. If you want to have poor boys polarity protection, stagger the lead lengths on your battery and ESC when you solder the connectors. Helps to prevent shorts, too.
Old Aug 01, 2007, 02:46 PM
ebill3 is offline
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Quote:
Originally Posted by magee8578
Also, if you go with Deans what is the maximum size battery you would use micro dean connectors on?
The battery size does not determine connector suitability - current is the determining factor.

Deans Micro - 10 Amps sustained, 15 Amps for 30 seconds.

BUT, IMHO, they are a very poor design. One protruding pin on a battery connector is an accident waiting to happen.

Bill
Old Aug 02, 2007, 10:11 AM
pilotpete2 is offline
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Quote:
Originally Posted by Hughes500Bob
You could also use APP Powerpolls .... but need a $50 crimper for them (no solder required).
No crimper required they are very easy to solder, waaaaay easier than Deans
Pete
Old Aug 02, 2007, 10:48 AM
johnrobholmes is offline
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Quote:
Originally Posted by ebill3

Deans Micro - 10 Amps sustained, 15 Amps for 30 seconds.

BUT, IMHO, they are a very poor design. One protruding pin on a battery connector is an accident waiting to happen.

Bill

I have had one such accident. A micro deans hit a banana plug just right, and shorted out. Totally ruined my pack, the wire, and the plug.
Old Aug 02, 2007, 11:04 AM
pwssr is offline
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Quote:
Originally Posted by magee8578
I am new to LIPOs and trying to determine what type of connectors to use on my battery packs. Does anyone have any thoughts on Bullet connectors vs Deans connectors?
Also, if you go with Deans what is the maximum size battery you would use micro dean connectors on?
I too am new to the "Electric" hobby world (did nitro cars for MANY years and nitro planes before that!), and picked up my first Heli several months ago. I have been lurking and learning and finally started buying stuff in the last few weeks (batteries, chargers w/ power supply, brushless motor, yada, yada!). Then it came time to look at how everything attaches.

Being an old fart with solid electronics training and set in my ways, one of the first things that "made the hair on the back of my neck stand up" was the whole power connection controversy. One thing I learned very early on in electronics was to NEVER have EXPOSED power connectors on leads attached to SOURCES. In this little world, BOTH connectors can be sources!

Now, to my way of thinking, Deans connectors (however huge the following) fly in the face of good sense (and obviously, what I was taught). Why on earth would you want an exposed power lead that was HOT????? Just can't get past that!

I know, I know, they are everywhere - but that does not make them a sensible choice. Having plowed through an ungodly amount of threads, there were always stories of the destruction caused by an exposed lead touching the wrong something!

Bullet connectors can a little better, but still have some of the same potential issues as the Deans and you have to be very careful to shield the connectors after they are on, etc.

So, MY only sensible choice became Power Poles:

.- can certainly handle the current (offered in different sizes)
.- don't have exposed connections
.- can't be plugged in "incorrectly" (how about those spring things on the Deans!!!)
.- plug and unplug "cleaner"
.- crimp on nicely (yes, you really should buy a half decent crimper, but only once)

So, that's my soapbox blurb on how I feel about Power connectors! Do your research, then decide. I have an order for connectors and a crimper on the way to me from powerwerx.com (recommended by someone on here, I believe). Hopefully my experiences will support my decision!

Please don't be too hard on me!
Old Aug 02, 2007, 11:05 AM
Santini is offline
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Quote:
Originally Posted by johnrobholmes
I have had one such accident. A micro deans hit a banana plug just right, and shorted out. Totally ruined my pack, the wire, and the plug.
I happened to have a couple of feet of scrap plastic hose laying around, I think it was from installing our water filtration system. I cut a small piece, maybe a 1/2 inch or so and found that it fits snug over the micro deans protecting the pins. Id have to look to see what dia/size the hose is, but it works perfectly and I keep a handful of them in reach where I charge. I recommend it.
Old Aug 02, 2007, 11:31 AM
Masterpiece is offline
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Quote:
Originally Posted by pilotpete2
No crimper required they are very easy to solder, waaaaay easier than Deans
Pete
I have to agree with pilotpete2 here. When I "used" powerpoles I always soldered them (mainly because I didn't know you could crimp them ). As easy as putting a little solder into the tab hole and a little on the connecting wire, hold the solderer to the tab (near the hole) and presto, in the wire slides and a good solid bond . I have TONS of powerpoles in my hobby box BUT I use Deans exclusively now. I guess because all my chargers use them. I even don't remember when I changed over to Deans . I have NO problem with Deans up to 80 amps
Old Aug 02, 2007, 12:24 PM
mcharles13 is offline
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I use power poles and used to solder them. Now i crimp them and love it. The crimper was very worth it. Also i've taken my power poles up to 138A (my wattmeter stops at 138) and have seen no problems whatsoever.

I prefer the APP because of the easy reconfigure option. I can reconfigure them much easier than deans. No need for a harness for series connections. For parallel connections just crimp 2 ends to 1. Also it's polarized w/o the need for male/female ends. All connections are encased in the housing and the housing is what's polarized.

As far as bullets i've never tried those as it just seems too volatile with the ends flopping all everywhere. I'm sure i'd find some way to inadvertently short them.

,mike
Old Aug 02, 2007, 12:27 PM
KatManDEW is offline
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I use Deans Ultra's up to 100 amps, and 6mm bulletsa over that. I use Deans Mini's on my fleet of indoor stuff.
Old Aug 02, 2007, 12:35 PM
savydad is offline
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hey masterpiece, would you care to get rid of all those "extra" powerpoles you have? I use them on everything that needs plugging, not just r/c stuff.

Todd


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