Just a sanity check here. I am CAD'ing a mod where magnetic repulsion holds the battery in tension against the positive terminal in place of a spring or other methods. Placing a 5/8" X 1/16" N52 disc magnet on the bottom of an 18650 with another disc magnet repelling it from below works good for tension. I have never heard of any problems a strong magnetic field would cause to an 18650 while idle or discharging but then again I don't know that I recall where such a strong magnet has been used directly against the case. I would assume since the case is metal that most of the field would carry along the metal case instead of through it. That assumption is based on graphic finite analysis of magnetic fields I did years ago when designing coil and rail guns. Even if not, I am unaware of any problems with soft lipo packs that don't have a ferrous metal case being in the vicinity of magnetic fields. Anyone ever seen anything to verify or discredit my assumptions? I am just being very precautious because I have both purposely under controlled circumstances and once inadvertently vented lithium batteries in the past and know the consequences first hand.
