Soldering Problem

[dezrik]

How do i solder loose batterys? Im trying to do a 6 Cell Brick Pack but i cant get the solder to stick to the battery

[SVEN]

Try scratching the surface of the battery with a piece of sand paper. It will allow the solder to stick easier. Also be sure to tin the battery and the battery bars seperately, then hold the bar to the battery and hold the iron tip on the bar to melt the two together.

[JohnRobHolmes]

Do you have any flux? Is your wire rosin core? If you just have rosin core wire, burn some of the solder onto iron while holding it right next to the sanded battery. The smoke will "prep" the cell a bit, and then you can touch the iron with more solder to the cell for a few seconds. You need lots of contact area on the cell, so file your tip flat if it is round.

[JasonInAugusta]

Article by Greg Vogel:

http://www.rccaraction.com/articles/build_battery.asp

[SIRMAXXALOT]

Battery soldering problems
read this thread all the way through.

[K_Willis]

Originally Posted by dezrik

How do i solder loose batterys? Im trying to do a 6 Cell Brick Pack but i cant get the solder to stick to the battery

How many watts is your soldering iron? You're going to have a hard time getting it to work with anything less than a 60. It can be done, but the more heat you have in your iron, the quicker the solder will melt. With a low wattage iron, the metal cell case conducts the heat away from the spot you are trying to solder faster than your iron can heat it, so you'll never get a good joint.

[SIRMAXXALOT]

I disagree, I have been doing this for years with a 40 watt Weller with no issues, although it has to have the wider chissel tip, part of the key is the size of the tip not the wattage.