PricePlunge offers the Eton BoostTurbine 1,000mAh Hand-Powered Battery Pack
, model no. NBOTO1000B, for $14.99
for shipping. That's tied with our mention from last week as the lowest total price we've seen. (It's a current low by $6.) This battery backup features a standard USB port and a hand crank. One minute of hand cranking purportedly produces enough power for about four minutes of talk time.