Only the Imedions are slow-discharge. In general you trade lower self-discharge for slightly lower capacity. As long as you are able to charge the powerex batteries within a day of when you need to use them you're good. The Imedions shine in uses like clocks or emergency flashlight that's put in a drawer and seldom used. One nice thing about the powerex 2700s is that they actually test out at 2800-2950 mah (mine do, anyway).