The most common symptom of an under-performing GEM battery is the loss of range. A fully charged GEM car should get at least 20-25 miles. To most people a new battery would be the best quick fix, however, this may only be a short term solution. The biggest factor in battery life of your GEM car battery is actually the usage of your GEM car. The most healthy batteries are ones that are used on a daily basis simply because they are frequently used and in turn frequently charged.
Consider this next time your GEM car sits for the winter with a dead battery. Try to get it out for a spin on nice days.