Copper or nickel

[toyguru]

I'm building a konion cell pack and need some copper or nickel strips to connect cells together. Would prefer a Canadian source, but will buy from wherever can geta decent price. Anybody want to sell some or know a good place to get some?

[jimw1960]

I recently bought several meters of the nickel tab material from a123.com. It took about 10 days to arrive from China. Free shipping. http://a123rc.com/goods-268-1m+Pure+Nic ... 26650.html

[liveforphysics]

If you're spot welding it, you're going to need nickel (unless you have a massively powerful specialized spot welder). If you're soldering it, copper has a big conductivity advantage, but nickel holds up better to flexing without fatigue over time, so take your pick.