Check out Don's 40-meter picture thread. The Manafont drop-in looks like a champ. Non P60 lights will be able to drive the XM-L harder and keep it cool enough to stay bright, and the KD C8 seems to be a favorite, though I don't have one.
The P60 is great if you already have a light that can take one. If I didn't already have several, I'd look at one of the C8 type lights which should do a better job of shifting heat. These LEDs are pushing the cells hard, better cells may well make for more output.
Thanks brted I will have a look at the Manafont drop-in
Christ! I just checked out Don's photo thread. Firstly great work Don! Secondly that Manafont drop-in looks incredible! I definitely will be ordering one later tonight.
On the subject of the P60 format: I do like the format I have 5 hosts that accept them but I understand that they are never going to be great at dissipating heat.
I am open to new lights/hosts if need be.
Budgeteer - I am not sure and you have me thinking about if my cells are up to the job of delivering the kind of current I want. The cells I am using are Hi-Max 2600mAh protected cells - these cells were formerly branded as WOW cells and performed well in tests. I was told by the seller that these are exactly the same cells as the WOW just rebranded.. not so sure about that now.
yeah 2.2a is low for the kd drop-in..mine is 3.2-3.3a depending on the cell..it'll measure 2.2a when the cell is at 3.8v..some of my cells only manage a 2.8a on a full charge so internal resistance is higher in some cells..i've got a few cells that manage 3.2a so I just stick with them for the higher powered lights..
Twice the capacity in mAh as mA is the usual recommended limit. I don't believe (with good reason - like every one I have ever measured) the capacity claims of any lithium cell.
I have pulled way more than that (like 12 amps from an 18650. Pulling that from multiple cells in series is asking for an explosion) from several cells - in single cell lights you will probably get away with it - but don't bet anything important on that.
With multiple cell lights be afraid.
You will probably not have bad consequences but don't come crying to me when you do.
Personal advice. If it uses more than one lithium cell in series - i.e., if it needs more than 4.2V - be careful.
I recall that those Trustfires with the black label & flame motif were tested by someone going by the name of Lermite when they came out. The information was posted in a thread for a completely different battery over on DX. They demonstrated capacity as rated and didn't have a problem supplying up to 5 amps. I haven't asked 5A of mine, but they don't even break a sweat at 3A.
Andi's report up above is kind of worrisome, though. These are my favorite $5 cells.
Welcolme fonzeca, that current for those emitters could ruin them permanently. I know because I ruin one with a brief test at 5A...only notice it because that were under close look wired and such...after that test the previous flux was never reached again. However still give a lot of light only problem is that I know his dirty secret
Also when the cells are under load the voltage can't be 4,2V as the power supply show, I did a quick test and a cell measuring 4.08 V open circuit go to 3.8V under a load of 1.6A ...