Based on my one use...it should last at least 2.5-3 hours...probably longer.

 

buy an adaptor to plug in to your lighter socket which allows you tou plug a usb cable in, then you can charge your phone in the car

 

As I said it's probably longer. I haven't been on a long enough journey to know for sure (on the return leg I plugged in the car charger).

I recommend this kit: DriveSafe Car Pack For The HTC Hero

It's not very expensive, but works extremely well. The car charger will stop the phone from running out of juice, and the holder is perfect.

 

I bought a second usb cable off ebay that u use in the car because then you can use the same cable if you lose or damage the original or if you need a spare. If you look on ebay though you have to make sure that the connection is right because there are a lot of people who claim their cable will fit the Hero but it wont

 

Thanks for this mate.

 

This is a genuine usb cable for the hero

? GENUINE HTC ExtUSB USB DATA CABLE FOR HERO G3 SENSE ? on eBay (end time 19-Jan-10 19:14:09 GMT)