Why is my Nissan Leaf's battery not holding a charge?

I recently purchased a used Nissan Leaf and I've noticed that the battery doesn't seem to hold a charge for very long. Is this normal? What can I do to improve the battery's performance?

It's not uncommon for the battery performance in used electric cars to decline over time. I would recommend checking the battery's health through the Leaf's diagnostic system and considering a replacement if necessary.