Tom E, you’re not the first I hear complaining about 7135s.
I wonder…could we as a community move on to some other solution?
I don’t mean specifically in this light. I mean some future generation of a standard BLF driver.
FET based drivers are said to be hard to do well. Though Lexel works on one now, he may succeed with it.
There are other stock regulators that we could choose though. F.e. Mike C, moderator007 have tried some powerful current-adjustable regulators, gchart played with non-adjustable as well.
That Mike C confugurations look like they would give most of the benefits of a FET based regulator while being much easier to implement.
These are very good batteries but they are a moderate discharge model so they won’t push the LED to the limit.
Take note that the positive poles on these cells are sunken, they won’t make contact in series unless you add a button top. Which is problematic because the positive poles are aluminium.
I'm a bit confused about those 4.800mAh. Barry are you sure these come from Tesla? Can you please check if these cells are the original Sanyo NCR21700A 5.000mAh? These are also sold by Vapcell as Vapcell INR21700 5000mAh, see HKJ's test here: https://budgetlightforum.com/t/-/54274
I agree with Agro that this battery is not considered as a classic high drain battery but a very good compromise between capacity and intermediate power drain (< 15A). Please have a look onto this comparison between this "Tesla battery" and the PLB-55A cell (to be found in Shockli IMR26650 5.500mAh or Keeppower 6.000mAh). As you can see there is no benefit in using the 21700 Tesla battery but only disadvantages due to less capacity and the need for an additional conductor between both batteries which again increases contact resistance and subsequently leads to additional voltage drop.
If you want to run the SP70 with maximum output, Samsung's 30T and 40T as well as Molicel's P42A are the best high drain batteries.
However, if Sofirn chose to offer the "Tesla battery" separately or in combination with C8G, it would be an intruiging option. :-)
Sofirn, read this. Don’t waste your time with Tesla battery. Too many problems and other good batteries are easy to source. If you were experienced battery company then maybe.
They offer the best 26650 batteries available so far. If Sofirn were able to source PLB-55A cells it would be really great. These cells provide more power than Sofirn's new 26650 HD cells.
If you want to go for 21700 batteries (personally, I'd really appreciate this approach), please try to get cells like Molicel P42A or Samsung 40T for these should have the best compromise between high drain (> 15A) and capacity. Samsung's 30T would not make much sense for it has not much capacity and its benefit over the 40T would only last some seconds with a fresh, fully charged cell.
So, there actually is a custom version of Andúril that supports both e-switch and the tailclicky forward switch. If we want to have Andúril on Sofirn's SP70 BLF edition, this custom version might be the right thing as flashing the standard Andúril would normally sacrifice the momentary turbo and mode memory function of the tailclicky. Maybe Toykeeper can share with us her thoughts about it. ;-)
For my super high amp 6V lights, I've converted over to only FET. The smooth ramping is a little jumpy at the low levels, but at least works. I can fry a 7135 in seconds on those lights. Sorry, haven't kept up with the new designs, but very interested in these alternate solutions. Of course what I want is smooth ramping capability on these other designs, and smooth transition to the full FET. Of course high PWM is a must, and no PWM preferred.
