Deal of the day: $20 off Tekkeon iPod battery pack

DataVision has the Tekkeon myPower MP1140 iPod Battery Pack for $39.99, after a $20 mail-in rebate. The rechargeable battery works with the with iPod 15GB, 20GB, 30GB and 40GB (3G & 4G), iPod mini, iPod Photo, iPod for HP and iPod Video. While not for everyone, the Tekkeon MyPower is a great option for iPod users who are constantly looking for an AC power outlet.

What: Tekkeon myPower MP1140 iPod Battery Pack
How much: $39.99 after $20 mail-in rebate
Shipping: Shipping price varies by ZIP code and delivery service
Where: DataVision (via CNET's Deal Exchange)
When: Through Sept. 7
Click here for product review.