Cell Phone Replacement Batteries - How do they DO that?

It's time to replace my cell phone battery.

The original battery (BL-5C) is a Lithium-Ion with a capacity of 850 mAh.

The new battery I am considering purchasing as a replacement is Lenmar's CLKBL5C. Notice that it has a capacity of 1,000 mAh and suggested retail price of $41.95.

I do a product search on Google for Nokia 3100 battery Lenmar CLKBL5C, and find sites like this one that offer the same exact Lenmar battery-- for just under $6. Not too shabby.

But wait, they say it's 10,000 mAh! It's the same battery; you can see the part number right there on the page. This is so cool-- not only are they giving us a huge price break on the battery, but they have subjected the battery to some arcane, occult process that increases its total capacity tenfold! Brilliant!

(Yes, that was sarcasm. The sad part is, there are plenty of web sites out there with this misleading error. Do your research, consumers, and you won't be led astray by such inaccuracies.)