All these 3.6v batteries are just triple-stuffed LiCoO2 batteries. Basically each one has three cores each pushing 1.2v in parallel. Thing is, while that allows for 3x the output it's also 1/3rd the charge and 3x the heat.
LiFePO4 batteries are much better for this sort of high draw-application. They push out a respectable 3.2v from a single core, and, while they can't hold as much energy as the more common CoO2 in the same space, since they naturally have a higher specific power, they can store more energy in a AA cylinder than the triple-stacked CoO2 battery can, and won't put out all that heat.
Thanks for the warning, Lucent. I don't see a way to remove the Ultrafires as an option though.
Thanks for the pointer, Andy. I didn't see it soon enough though, missed the drop :(. Still, with all the fancy flashlights cycling through the site, seems reasonable to keep batteries and charger drops coming too.
Hey Guys,
We are doing a package deal with the 18650 Nitecore batteries and charger: https://www.massdrop.com/buy/intellicharger-18650
Let us know what you think and please spread the word.
Thanks!
Andy
I would recommend that people avoid the Ultrafire brand. There is no one manufacturer for these batteries and people often sell the wrappers online. As such, anyone can wrap whatever battery they want and sell them as Ultrafires. Frequently these turn out to be recycled old cells, or cells with much lower capacity than stated and are a major hazard.
The NiteCore flashlights seen on Massdrop look great, but they require 18650 batteries, which are a fair bit rarer and more expensive than AAs. So I suggest a Massdrop to supply the batteries as well.
