It's definitely a needed service. I've occasionally done it myself, once to rescue a laptop for which I could no longer get an affordable battery, but for some things it isn't worth the trouble of tracking down the batteries and figuring out how to disassemble the equipment, which is often sealed, so in the case of a cordless screwdriver I just tossed it, but if there had been someone who could recell it for, say, half the cost of a new screwdriver, I would have had it recelled.