I have a raft of 6V UPS batteries pulled while they were still good. They've been sitting on the shelf for 4 years or so and the charges are all gone. I tried recharging one with a 6V charger and it ...

In brief: If you're someone who uses gadgets until every drop of life has been squeezed out of them, then this battery tech might be right up your alley. A Chinese research team has devised a clever ...