Lithium vs. Lithium Ion
 

First, to be clear, there is a world of difference between a "lithium" battery and a "lithium ion" battery.

Casually, people call lithium ion batteries "lithium" batteries, but there is an important distinction: you cannot recharge lithium batteries. Fortunately, you won't have a need to for a long time. But once expired, lithium batteries are no longer of use. Rechargeability is the reason lithium-ion batteries were developed. Make the distinction between "lithium" and "lithium-ion" batteries---especially if you're considering buying electronics with "lithium batteries." Don't assume they're rechargeable.