David Lau , Dec 17, 2004; 01:39 a.m.
All rechargable batteries have a definite live span. After recharging a no of times (typically after 200+ times) they can retain only a small portion of the energy comparing to when they are new.
Battery that can only give you a few shots is definitely not normal. It probably is dead - either it has reached the end of its live after many recharging, or it is faulty.
Manufacturers are publicising that lithium ion battery has no memory effect so you can recharge at any time even after it is being used for a short while. Remember even a short recharge adds up to the countdown of the no of times that a battery can be recharged.