ORIGINAL: jester_s1
You shouldn't run soldered packs in airplanes anyway. The vibration can break down the solder joint causing it to fail. A quality pack will have the cells welded so that doesn't happen. It'll also use good cells, which basically means Sanyos. Take a look at
www.hangtimehobbies.com for some quality packs. I'm a satisfied customer and can attest that they sell a reliable product.
if you know how to solder they shouldnt fail...period
as for soldering your own packs dont bother...unless you already have the batteries
just buy them from here,
http://www.all-battery.com/60vrcairbatteries.aspx
http://www.all-battery.com/48vairplanebatterypacks.aspx
i literally have hundreds of their cells and all have worked great. some over 3 years old and been put through hell and still going strong