26650s beat 18650s in holding voltage, that’s what they are really good for…I learned that with the BLF A8 which has really nice runtime
The Efest 26650s are really nice if you don’t consider the miserable capacity.
What about paralleling some 18650s?
I tried once to order efest batteries but never got an invoice, I am really confused about their shop.
With these currents the protection circuits are suboptimal as they steal voltage, I have seen some nice tests here from night crawl or so which compares the Panasonic PD with the Samsung20r and the conclusion was that the Panasonic are better(almost same voltage but more capacity) below 7A and from that the samsung is better. So HKJ graph from the enerdan PD is different…
Here it is https://budgetlightforum.com/t/-/15892#comment-338894
But if you can use 26650s than this doesn’t matter anyway…until you go in the 15A field
I make my living in heavy construction. My company bought in to the Milwaukee V28 li-ions when they first came out 5 or so years ago. As the batteries have died I have been able to harvest on average about 4 cells out of the 7 cell packs. They are Emoli IMR 26700’s and rated for EXTREME withdrawal currents. They are too long for some lights but fit most of mine. I mainly buy 26650 lights nowadays because of this nearly inexhaustible supply of batts for free! Sometimes all 7 cells are flat, other times only 1. Check those discard bins at Lowe’s and Home Depot!
I'm afraid I might run into length issues with the 26700's. I don't have the light in hand yet. About the Efest 26650's, thanks to ecigs I can get these cells from numerous US sellers. I'm afraid to ask to dive into the battery recycling bins! Each battery is also wrapped in a plastic bag (at least at my HD).
TF Flame 26650 cells seem to do OK then. I knew they hold up better than most 18650 cells, but I figured the PDs could hold up against a standard 26650.
In my case, I need the 18650 format for the BTU Shocker, and I wanted some capacity at the same time. Hopefully they provide at least some additional performance over my Sanyo ZTs.
Garry, in your case, it seems a 26650 is the way to go, and TF Flames (or KK ICRs) may be the best balance of budget and performance/capacity.
TF flames are not able to deliver 10A! The protection kicks in at 7A or so
And the biggest problem is that there a not many tests out there in the 26650 sector. I have found the soshine 26650s quite good for me but I would really like a test of them to compare them before i can recommend them.
for me it was the only opportunity for cheap protected 26650 which can deliver 9-10A.
Perhaps I am a bit spoiled by the many 18650 tests.
The soshine and the mnke are often found but its hard to compare them by ourself.
I have two different versions of the soshine 26650, not sure if they are less good than maybe TF flames?
All the multi emmitter lights need good 26650s which can deliver serious currents…
I am always a bit confused if the two examples you test behave very differently, because the standard 7-15XML lights are powered in series so if one cell dies the light output dies….
Me too. I think they have a min order of $50 or maybe $100. I attempted to place a small order and got an email afterwards saying they could not honor it. There are often some Effest cells on fleabay. Not sure about 26650. (I have some of their 18360s and they’ve been great.)
I have a few Pana PD 18650s from fasttech. They all have that circular groove in the tail. It doesn’t affect function. They all work well, best I can tell. My lights running above 3A do seem brighter with the PDs than my AW IMRs. They are good cells.
Thanks for the tip on the power tool packs. I don’t have any 26650 lights currently, but that could be a handy tip.
When the two tested batteries has different capacity, it is best not to use them in series (With protected you can do it).
It is also important to remember that I only test two batteries, i.e. it is very unlikely that I get the best and worst performance you can expect in these two batteries.
The same argument also means that even if two batteries match in capacity, there is no guarantee that all batteries from that brand will match in capacity.
If you want specific batteries tested, you can always ask me (Please include a link to a shop that sells to EU) and I might include it. But my lead time will often be between one and two months, before I have made the test (This depends on shipping time and how many batteries I have in queue).
Efest has more than one website, it looks like http://www.efestbattery.com/ can be used for smaller orders (I have not tried it).