Please respond!!!

[exmark93]

i just bought a thunder power 65c 5300mah 2s pack for 120$. i think it may have a problem.
the turnigy i have been running since this springs is WAYYY faster than the thunder power and delivering the same run times. and the thunder power gets warm to the touch after use. odd for a 65c battery in a slash 4x4. this is tickin me off, i thought thunder power was supposed to be the bees knees! if you have any idea of what is going on PLEASE REPLY!! :\

 

[slowngreen]

Prolly a dumb question but is the turnigy a 3s by chance?

 

[exmark93]

hahaha no both 2s

 

[slowngreen]

lol worth a shot. I've had packs not perform well before and it ended up being that they needed a new plug or a better solder joint, then they woke right up. Might check that.

 

[exmark93]

alright ill try another deans

 

[sweetdiesel]

Are both packs the same rated capacity?

+1 on what Lloyd said, check your solder joints.

 

[nasir]

I would recommend changing the connectors giving it a good balance charge and then pray to the lord lol.

 

[w bill]

lol worth a shot. I've had packs not perform well before and it ended up being that they needed a new plug or a better solder joint, then they woke right up. Might check that.

I'm with Llyod you got a resistance problem going on connectors or solder joints.:whhooo:

 

[hamz9561]

I agree with the others. It sounds to me like a cold solder joint.

 

[flm_savage]

Post pics of your solder joints.

Sent from my DROIDX

 

[exmark93]

alright i resoldered the joints and it seems better. doesn't get as hot. sweetdiesel (like the name!) the turnigy is 25-30c and the thunder power is 65c. but back to the soldering, i striped more off of the wire got a real nice connection and seems to have helped, the original wire was about 2mm of wire so maybe they didnt solder it correctly. thanks guys for the help.

 

[sweetdiesel]

the turnigy is 25-30c and the thunder power is 65c.

That's the C rating, not the capacity. The thunder power capacity is 5300mah, the turnigy is (fill in the blank).

 

[exmark93]

ohhh geessss, sorry bout that 5000mAh

 

[sweetdiesel]

Interesting. I would expect that the slight weight disadvantage of the TP pack would be negated by its much higher "theoretical" maximum current (344 amps vs 150 amps). What kind of charger do you have? Some chargers can check the internal resistance of the pack. If you do not have this function on your charger, you can also check resistance using a multimeter. See this video for simple instructions.

[ame="http://www.youtube.com/watch?v=q58E8DdNgDs"]YouTube - How to test the internal resistance of a battery[/ame]

My guess is one or more of three things has occurred:

The resistance of the TP pack is abnormally high which would suggest that you got a bad pack.

TP overrates their packs.

Turnigy underrates their packs.

 

[sweetdiesel]

This is assuming you tested the packs again and the TP is still not performing as expected with the new solder joints.

 

[exmark93]

thunder power pack is performing much better. thanks guys you saved me a lot of trouble

 

[sweetdiesel]

So does the TP pack perform as well or better than the Turnigy pack?

 

[Monkey Wrench]

Interesting. I would expect that the slight weight disadvantage of the TP pack would be negated by its much higher "theoretical" maximum current (344 amps vs 150 amps). What kind of charger do you have? Some chargers can check the internal resistance of the pack. If you do not have this function on your charger, you can also check resistance using a multimeter. See this video for simple instructions.

YouTube - How to test the internal resistance of a battery

My guess is one or more of three things has occurred:

The resistance of the TP pack is abnormally high which would suggest that you got a bad pack.

TP overrates their packs.

Turnigy underrates their packs.

Speak English you geek!

 

[sweetdiesel]

LOL glad to see you back Mr. Savage!

 

[Monkey Wrench]

LOL glad to see you back Mr. Savage!

Glad to be back, Mr. Le! Sure do miss your in-depth, over-my-head explanations for something as simple as, "Come on, fellas, it's ALL ball bearings these days!"

That's what I call "job security"!