nice find.
was a little surprised it doesnt use lithium batteries, and not nickel cadmium either
apparently it uses NiMH or nickel-metal hydride batteries
never heard of it but found a brief description on wiki
"A NiMH battery can have two to three times the capacity of an equivalent size nickelcadmium battery. The energy density of a NiMH cell is similar to that of a lithium-ion cell, but the rate of self-discharge is higher. This means that a stored NiMH battery will lose charge more quickly. In 2005 a low self-discharge NiMH battery, which stays charged for much longer, was developed."
he says at least 8 sessions with 3-4 bowls a sesh.
not too shabby
doesnt look seem like hes actually selling it tho