How exactly can test a digital camera battery charger?

Question

I have a digital camera that just doesn't seem to work due to the battery draining too quickly. Or at least so I always thought. Someone suggested I test my battery charger. How would I do that exactly? I'm a total rookie, but I'm a total DIY enthusiast. Help! It's a Canon Digital Elph PowerShot S100 battery charger. The battery type is a Rechargeable CE Li-ion Battery Pack 3.7V 1000mAh. Item #BP-CN1L or Item#NB1LH. Instructions would be great!

Answer 1

I rubbed two large melons of polish fruit on my camera charger, and I got a gooser.  Hope this helps.

Answer 2

The S100 is an old camera, and I would suspect the battery pack is giving up the ghost before I turned a suspicious eye to your charger. Lithium ion batteries have a finite amount of recharge cycles, and if your battery pack is several years old, it might be time to invest in a new one.