Some older AA NiMH which don't want to charge on two other chargers, are being charged by the Renewal. It is slower, no big deal. For that alone it is worth holding on to. I don't expect to get
too many more cells though.
The six rechargeable AA alkalines I recovered have been used in an outdoor temperature sensor, in pairs. Their capacity is going down, still usable after over a month but not much longer. This sensor seems hard on alkalines, holding up a few days or week maximum.
Dave