Don't you mean "crackberry". Since they're the most addictive thing in IT right now...
  It depends on the model. Most re-charge in the cradle, but some have replaceable batteries. If it's a newer model it's probably a cradle re-charger. 
 Tell him to bin it, get an ipaq and use this instead  
www.gotomypc.com or 
www.citrix.com  Not that I work for them of course, not not me 
