the belt shuld have about 1 cm of movement under firm finger pressure at its longest distance between points (pullys) are the pullys or belt oily - is a problem sudgest droping into fast fit shop ( a t s . hi,q  .  quik fit .ect  .   they dont charge to check things .  the battery could have an internal fault (shorc circuit) causing it to drain down over nite , the afore menchond fault could also cause the belt to slip as the alternater ( thing that makes the power), if there was a short  would be very very hard to turn by the belt ,
                 lee nias
                
 March 2005