The eneloop is a high-capacity nine-volt battery power supply that is rechargeable hundreds of times and capable of two amps of output current. It is the same size as a standard effects pedal (2.5 W x 4.7 D x 1.7-inches H) and the advantages of using it are many. Besides eliminating battery e-waste (and the inconvenient but proper disposable procedure for all those 9-volts), you can go totally mobile with your pedal board without seeking out an AC outlet for your wall-wart power supplies.

Since all your high gain pedals are now powered by a single beefy battery, you'll hear an immediate drop in the noise and hum floor plus you'll never struggle with AC power ground loops again. With two DC outputs (up to 1,000ma each), Pedal Juice can power multiple pedals at the same time with battery life totally dependent on how many and how much you use them.

I powered up my two battery-eaters with no hitches: a Marshall practice amp and a Planet Waves chromatic stomp pedal tuner, with the SANYO Pedal Juice. The little Marshall sounded much better powered by the eneloop battery than an internal nine-volt--as if on a wall-wart but much quieter when in overdrive mode. If totally discharged, Sanyo's eneloop Pedal Juice recharges up in about three hours but it does not put out voltage while charging. I liked the convenient on/off pushbutton that turns your entire pedal board on/off. It's good for powering down during breaks as there is nothing to unplug.