Li-ion batteries can be dangerous if you use cheap batteries or cheap chargers. You also have to be willing to measure their voltage to keep them healthy. My personal recommnedation would be a Trustfire 5000 mah protected 26650 from CNQualityGoods along with an intellicharge I4.
This looks like an interesting flashlight, especially considering the price, and I would buy one if it hadn’t been for the recent issues some have had with it. I would like to stick with AA’s, so I would be interested in what is the estimated output in lumens on high with 3 Eneloops compared to that obtained by using the lithium battery, which I assume is used to get the 910 lumens output.
It’s the AA carrier that is responsible for the reduced performance on NiMH. Too much resistance. But you can fix it up. Spend a couple of bucks on some better contact springs, solder them on, and you’ll have your Eneloops delivering the full 2.8 amps.
Thanks, cainn, that’s good to know, meaning that this component is easy to upgrade. Would be nice to find a finished one of higher quality. Alibaba and diytrade seem to have several, but sell only in larger quantities.
I've come to the conclusion that at the $45 price tag of this Cyclone (+ $5 holster cost) the Jetbeam PA40 is a better buy for a few bucks more if you're not looking for max output. I don't own either, but researched for my co-workers use where they need significant output with good runtime, dependable, able to run on common cells (even alkalines in a pinch), and available in neutral white.
You could always pick up a couple of these as well. I hate the white carrier. Black is sexier. Plus once you have a spare or two, you tend to become a little more deliciously reckless with your modding efforts