IJoy 4200MAH 26650 Battery
Excellent first class batteries.
So I use this for a powerful torch and have previously bought the 18660 to do the same. I used the panasonic. Surprising these have really lasted the 18660 by some margin providing full power for 1hr 50 instead of about 55 mins on the others. This is worthy of 5 stars. That said the 18660 batteries come with a small very useful plastic box that I would have found so useful had these too.
So power wise these are so far awesome. Take quite a while to fully charge but worth the money!
None other than Mooch himself has said that this (and the later wraps of the same cell) are the first 26650s to behave like a decent 18650 on current delivery and voltage sag under heavy load, so it was the one I'd been waiting for. He's the one who I believe on battery performance, as he has the expertise, equipment and independence that you can't be sure of from other sources. It would be worth Next Day Batteries asking Mooch if they can link to or otherwise use his test results, as the cells they stock are ones he recommends, I believe without exception. And his tests on Li-Ion cells are realistic, thorough, and brutal - no tested cell is fit for use when he's done with it, as he pushes them to their limit and beyond, to find out what that safe limit really is.
And I didn't have to wait long at all between ordering and delivery, and half of that was my own fault for ordering at stupid o'clock!