Originally Posted by
ChrisWagner
There's a Danish independent who performs technical tests on batteries, chargers, meters and other associated equipment. See this article->
Batteries with ridiculous ratings for a reasonable assessment on 18650 cells.
If you're not buying branded batteries from an actual manufacturer like LG, Sammy, or Sanyo you're likely buying a re-branded reject from the same factory that didn't meet the manufacturing standards (capacity, etc.). This is exactly what the 'Batteries with ridiculous ratings' thoughtfully provided by
ChrisWagner is saying. The Ultrafire, GIF, and others aren't 'fake' per se, they just didn't make the manufacturing spec for some reason even though some of them are made on the same factory floor (not sure about the UltraFire 9900mA which looks like a dangerous piece of junk). Sometimes it's OK to use these. but for mission critical stuff (i.e. cycling at night) it's better to pay extra for a quality battery cell from one of the big manufactures, which are the 'good' batteries in the article.