Looks like this is the place to post this.
On Saturday May 5th about 1:00 p.m., I placed an order with 4Sevens for their 26650 battery charger and two 26650 4000mAh batteries. At 1:00p.m. today the package arrived, wow. I don't know if this is normal or perhaps I'm accustomed to waiting for packages from Hong Kong. Either way, well done 4Sevens!
After looking everything over, I used my DMM to check the voltage of each battery and found them to be 3.75v each, basically exactly what I would have expected. I tossed one into the 4sevens charger, flipped one switch from 3.2v to 4.2v and the other switch from .5a to 1a charging current. While that one was charging, I tossed the other one into my Pila charger, which slipped right in, no fuss, no magnets and started to charge away. Shortly thereafter when the light turned green on the 4Sevens, I popped the battery out and checked the voltage, which was exactly 4.2v. Wow, I wish my Pila charged my 18650's to spec instead of 4.15v.
I checked the other 26650 on the Pila, and found it still charging and at 4.09v, removed it and tossed it in the 4sevens due to the slightly higher charging current and fantastic end voltage the charger achieves.
4Sevens boast their charger is optimized for their batteries, and I'd have to agree 100%. Unless all 26650 chargers truly fully charge these batteries to their rated 4.2v without over-charging them, I'd say this was very good money spent.
A few photos of what I purchased, excluding the Fandyfire of course.
Comes with a wall wart charger, 12v cigarette lighter adapter, and USB charger cable for other devices.
After fully charging one, I placed it in my Fandyfire HD-2010, which swallowed it right up and fit perfectly, and checked the tail cap reading. It shot up to 3.6 amps on HIGH mode and continued to rise slowly up from there, so I disconnected my DMM. That same test using a Redilast 18650-3100 yielded about 3 amps. Man do these batteries pack some serious power. Now I know why so many of you love them.
I'm curious to see when my Trustfire 5000mAh 26650's arrive from Manafont soon, if this charger will charge them exactly to 4.2v as their own brand does, or undercharge them to some degree, or slightly over-charge them. I'll have to keep an eye on it and let you all know.