5mm bullets for 4S?

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Old 05-15-2017, 07:08 AM
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Default 5mm bullets for 4S?

I'm using these bullets from TQ https://tqwire.com/shop/rc-products/...-tallflat-top/ in my ebuggy and already after just the 2nd run on one battery it got hot and melted the case of the battery some. Batteries are Fantoms https://www.fantomracing.com/proddet...prod=FAN26175B.
Who else is using bullets on their 4S packs and what ones are you using? I know I'll have to make sure they are clean and have good tension no matter what, just looking to see what's working for other people.
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Old 05-15-2017, 09:00 AM
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Originally Posted by nitrousdave View Post
I'm using these bullets from TQ https://tqwire.com/shop/rc-products/...-tallflat-top/ in my ebuggy and already after just the 2nd run on one battery it got hot and melted the case of the battery some. Batteries are Fantoms https://www.fantomracing.com/proddet...prod=FAN26175B.
Who else is using bullets on their 4S packs and what ones are you using? I know I'll have to make sure they are clean and have good tension no matter what, just looking to see what's working for other people.
With a good solder joint there is no reason they should have melted short of, well, a short lol.
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Old 05-15-2017, 09:16 AM
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I hadn't thought of that, it could be a bad solder joint on the tube in the battery. Or possibly the that tube is slightly larger than the one in the other battery. I ran both batteries twice and noticed the melted case before I ran the non-melted battery for the last run and it was fine afterward. Seems like I may need to get a hold of fantom about it.
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Old 05-15-2017, 09:21 AM
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Originally Posted by nitrousdave View Post
I hadn't thought of that, it could be a bad solder joint on the tube in the battery. Or possibly the that tube is slightly larger than the one in the other battery. I ran both batteries twice and noticed the melted case before I ran the non-melted battery for the last run and it was fine afterward. Seems like I may need to get a hold of fantom about it.
That would be kinda scary if it was a bad factory solder. No control over those =/
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Old 05-15-2017, 09:35 AM
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You ruled out a cold joint on the bullet itself by running the second pack so to confirm, would get ahold of the mfg on that battery. Would also store it in a lipo sack asap as you don't know what's going on with it internally.
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Old 05-15-2017, 11:44 AM
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Now I'd really like to open the case and check the solder joint, but better contact fantom first. I store my batteries in an ammo can so no worries there.
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