Your experience with the Powerex 2700s vs other batteries flies in the face of the experience of almost every other person who has posted here about them, including my own. Until Magic-Flight introduced their custom battery the agreement was virtually unanimous that the 2700s out-perform everything else.
I just stopped using the super high capacity batteries that were NOT of the low self discharge type years ago as the problem is sure if you use them immediately in a high drain device like a digital camera it is great or if you keep them on a trickle charger then they work awesome. If you are like me and charge them and then expect to use them 3 months later (due to owning SEVERAL dozens of NiMH AA and AAA batteries) you will be saddly disappointed after they fail to work. Energizer 2500mAh AAA's were some of the worst offenders for this high discharge rate and there are several threads about this over in CandlePowerForums, battery subforum. Powerex's I have owned spanned from the early models that were 1800mAh all the way to the 2700mAh versions. The discharge rate was what made these seem inferior. It wasn't until the Eneloops took the world by storm with the low discharge rate batteries, that competitors followed suit with their own (or just relabelled Eneloops AKA Duraloops/Duracell) LSD batteries to stay competitive.
I'm not sure which factory you mean when you say "factory Powerex 2700s" but if you mean Magic-Flight then you are mistaken. They have never shipped 2700s. If you want the story behind Magic-Flight's battery choices then read the MFLB Vaporpedia entry for the section on batteries, specifically the question
What batteries does Magic-Flight ship/recommend?
That's my mistake there as I do recall reading the Vaporpedia page on the MFLB way back before I bought mine and it does say they shipped with the 2400 Immedions but that they recommend the 2700 Powerex cells.
I don't understand your comment at all about Magic-Flight not using the best batteries from the start. First of all, nobody made that assertion although I believe that they did choose the best option they had at the time. Second, I don't see why changing the stock battery is somehow seen as a negative. It seems to me that if they discovered there was a better battery than their current choice, it would be a positive for everyone if they switched. Better performance wasn't actually the reason for switching until they developed their own batteries anyway, as the Vaporpedia article describes.
That wasn't my comment, but my response as OF made that comment about them using the best batteries at that time. I was basically replying that the statement cannot be true if there were several vendors over that course of time (Vaporpedia lists 6 different battery vendors). Not saying that Magic Flight wasn't interested in the best battery for their product, but like they mentioned in the Vaporpedia article, when they were using Tenergy and found out they were receiving batteries with much less capacity than 2600mAh which is what they were buying, they severed ties with Tenergy. So my statement would be true in that those Tenergy 2600 mAh cells were not the best batteries at that time. To be honest I am a battery geek and at that time the Tenergy 2300 LSD were the best (from Tenergy) as the 2600's were known in the battery and light community as dogs.
Finally, you are putting way too much emphasis on the mAh rating. mAh is a measure of capacity not power. What matters to the LB is the discharge curve and the internal resistance, not how much the battery holds. Yes, they recommend a lower limit of 2000 mAH, but that is because a lower capacity battery will not get you through a trench, not because they won't work at all. I've used 1500 mAh batteries successfully, just not for long.
Contrary, I am actually agreeing with your point that capacity is just one variable and one in that is usually a marketing/selling point to the uninformed consumer that just assumed bigger is better.
Again, experience at more normal current levels is not useful here, really. This is an exceptional use, well outside the guaranteed specs. I don't believe MF ever used Tenergy batteries as they were never the best available at the time? Today they recommend only the Maha 2700 HSD and 2400 LSD units aside from the custom ones they've just introduced. Those two have a modest but useful edge over the other depending on the usage pattern of the owner. There's a wealth of information on this thread on this topic, you might want to review that?
The Vaporpedia article does state they used Tenergy 2600mAh cells originally (which had they used the 2300 LSD cells available also at that time) they would have been much better off as they are similar to the Immedion 2400's they were just recently using)
Published mAh ratings are, I think, very honest with honest battery sellers. There are very strict industry rules for how those measurements are made, well policed and reviewed. They're just not useful to us in an absolute way. You can buy a top end charger like the popular Maha C9000 and test this yourself under the proscribed conditions. Lots of us have and trust the published numbers for what they are.
I own a Maha Wizard One C9000 (actually 6 of them) as well as 3 LaCrosse BC-900s as well as several other brand chargers accumulated over the years (Eneloop/Duracell/Energizer/Ray-O-Vac/Maha C770/Maha C204/MahaC240 etc.)
If you think about it a bit, the trade offs made to get the internal resistance down (shorter and thicker current paths inside for the most part) eat up the space active chemicals could take to give higher raw numbers. Numbers sell so normally that trade off (in favor of extreme current levels) is normally tilted away from our needs.
I agree 100% and I would love to try these new batteries with the MFLB. Is it true they won't be available for sale (individually) until late summer or early fall? I really don't need a second MFLB just to get new batteries, even though I would love a Walnut MFLB but not practical just for a new color box.
I think I can absolutely state my opinion that they have used the best available battery at any point in time (at least from one set of perspectives), can you show any case where they used an inferior battery? As conditions changed they quickly adopt the best for their customers.
Think what you wish, but you'd carry more weight I think with an solid example or two to back it up?
OF
I never disputed the idea they wanted the best battery for their product. I was just stating the idea that if they used 6 different companies, that all 6 couldn't be the best. Simple as that. But to answer your point, in the Vaporpedia article it does mention they got duped by Tenergy when they were using their 2600mAh cells and Tenergy decided to make the cells slightly 10mm or mills smaller where they wouldn't work in the MFLB as well as the stated capacity not being accurate but outright fraud.
To both pakololo and OF, I was really hoping for more discussion on the problem of the MFLB leaking herb out of the plastic lid more than a battery discussion (but that was cool too). I'm thinking if there was a way to tighten the lid somehow maybe this would be a non-issue. While the click top lid is cool it doesn't completely prevent the lid from opening on it's own while in a pocket. I've had empty trenches before from the lid opening slightly, and was going through the lint in my pocket like a crack fiend, not good...
mod note: Please avoid back-to-back posts, use Edit instead. Two posts merged.