Is there a difference between brands of NiMh batteries or do they perform about the same?
There is very little difference between brands of NiMH batteries however some brands are higher quality. NiMh batteries will last for many years and will probably be lost or become obsolete (as all electronics do) before they wear out. It is probably best to avoid the cheapest brands especially if you are using them in expensive camera equipment since defective batteries can leak or perform poorly.