Buy.com this week is offering the Kensington Travel Battery Pack and Car Charfer for iPhone/iPod touch (model no. L33456US) for only $45.73, with a $10 rebate available that drops it down to $35.73. This makes it $34.26 less than its $69.99 list price, and the best cost we have seen for this particular model by about $10. features include a integrated iPhone dock and USB connector, along with a built-in rechargable lithium-ion battery that can provide up to 23 hours of additional use, 7 hours of extra video, or five hours of more talk time. FREE shipping is included and sales tax applies for residents of New York and California.

The 6-in-1 Car Wireless Transmitter Car Charger for the iPhone and iPod touch is also on sale at Buy.com today, and has went from $24.00 to $11.99 with FREE ground delivery still included. Head to Newegg.com if you want to save $55 on the Energizer Protective Case with Built-in Battery for iPhone, its on sale for only $24.99 and has included FREE shipping.  Lastly, Amazon.com is offering 15% off the Mophie Juice Pack Case and Rechargeable Battery for iPhone, which places its current sale at $84.59 and that’s with FREE ground shipping included.