Seemed like a good idea, but then so did the idea of making gold from lead at one time. All I can say is BEWARE! Used it a couple of times, and all seemed well, until it exploded. The explosion was very loud and sufficiently powerful to blow the lid off the charger, and do damage to a couple of the battery slots. Admittedly, the instructions do contain a warning against recharging completely discharged alkaline batteries, but the ones in question were definitely still showing 1.25 volts on a voltmeter before attempting to recharge them.
I have put this one down to experience, and will not replace or buy this item again.