Yes, they are mentioning the initial specifications: 80% energy left in discarded batteries, gear stops at 1.4V, Multiplies life of battery by 8.
They say they don't know if the claimed specs are true - with a grin - so it's not just repeating the fluff.
You know where the real forefront of miniaturisation and efficiency in boost converters for AA Cells is?
LED Flashlights.
Zebralight for instance, build single-AA flashlights which are incredibly efficient and have fantastic buck/boost DC/DC converters which are miniaturised into the head of the tiny torches. Such as the SC5 AA, for instance:
this one does it really well, with a super flat output "curve" or straight line, as the battery discharges right down to 0.7V.
And can anyone here understand French as it's all Greek to me.
Battery chemistry. The chemical reactions will slow down as the ambient temperature drops, limiting current flow. Also when the cell is subjected to higher load current, what you're asking from the chemistry is for a lot of ions to find their way to electrodes really quickly, this is a physical process and it takes time for it to happen, hence the faster you want it to go, the less time it'll last and vice versa. This is also why cells can appear to recover significant capacity after a rest: the chemicals have had a chance to disperse more throughout the whole cell, so you don't have a huge build-up of 'spent' chemicals directly around each electrode.
(Ouch 1hr of speak? hum I will see what I can do... )
My EDC is a Fenix LD01 - same as Dave Jones. It's truly keyring size and runs on a single AAA battery - none of that bulky, high-current, AA cheating.
I will watch this and make a transcript of this video (or try to) then translate it to english. I will do my best.
(Ouch 1hr of speak? hum I will see what I can do... )
I'll hit the 3 hour mark in 9 minutes and the thing is still going and the backlight hasn't even dimmed yet. It's currently at 2.63v under load. In their video, theirs supposedly completely died before it got to the 2 hour mark. Their graph also shows a drop in current at about 1 hr 40 min, which I'd assume is the screen dimming at 2.6v. That means they started the test with a not-so-fresh battery considering mine is about to hit 3 hours and still hasn't dimmed yet.
EDIT: I forgot to mention, agilent's benchvue software limits datalogs to 1 hour each if you have the "free" version (paid one is $200). Those cheap bastards. I would've been better off using the same arduino that's controlling the servo to datalog to an SD card
morons.
The device will show it can no longer display the back-light or it will shut down. That is a fail for either mode. With the their (custom) boost converter it runs almost 6X longer. UL has verified it in their lab.
Ah yes, then the comeback is UL is paid so they do what you want. Really, are you all that retarded. They are in business to make money, they charge to test a product. I do not know of any labs that test a company product for free. You cannot buy the result.
I have dealt with UL many times over the course of my career in Silicon Valley. They are very rigid in terms of reporting results.
And, genius, if you use an off the shelf boost converter you will likely see a different result. That is not their product. You may only see 2 or 3X. Keep digging. They win, you lose. Do something constructive. Like little children stomping their feet.
If you want to find bad things you will. If you want to find good things, you will. Just constantly negative. You cannot stop them. They have investors that have done due diligence. Try an incandescent flashlight. Will it stay brighter longer with a highly efficient boost converter? very simple. try it.
UL testing is for safety and not to verify that it works as described: http://ul.com/ anyone who understands anything about this will see a mile of that it's a scam and fast turning into downright fraud. Wony don't you go back to your rich boss and tell him he is never going to get anywhere. Well actually he may and that is why he is paying all this money to get fake articles and reviews not to mention youtube thumbs down. The device is cheap, $2.50 and will be bought in mass (he hopes) nobody is going to take him to court over $2.50 but collectively he will make a lot of money out of this fraud. These days you can't get justice over teaching material that tells lies that is governed by a government body never mind a misleading product.
Just the claim that it must work because it was UL tested is utter fraud and show batterizer and your boss for the scammer and fraudster he is. No go back and tell him we all said "Hi" oh and tell him that an oscilloscope with a calibration signal on a video at the back is not going to fool anyone, really how pathetic, in fact the most pathetic thing I have ever seen.
Quote from: Fungus on Today at 07:32:49 PM
>Quote from: samgab on Today at 06:58:11 PM
... Such as the SC5 AA, for instance:
Let me guess: You own that model.
My EDC is a Fenix LD01 - same as Dave Jones. It's truly keyring size and runs on a single AAA battery - none of that bulky, high-current, AA cheating.
Quote from: samgab on Today at 06:58:11 PM
this one does it really well, with a super flat output "curve" or straight line, as the battery discharges right down to 0.7V.
Why is it much brighter for the first 17 minutes? That doesn't seem like "super flat" to me.
Don`t know if anyone has discussed this before but I`ll ask anyway, will the batteriser drain power from the battery when it`s attached to it? So that the "whatever it`s attached to" will drain even when it`s off?
Don`t know if anyone has discussed this before but I`ll ask anyway, will the batteriser drain power from the battery when it`s attached to it? So that the "whatever it`s attached to" will drain even when it`s off?
I bet you for one moment they never thought any EE would pay attention, nor would someone with a large following like Dave catch them in the act. They completely miscalculated that they would be called out to prove anything.
Interesting Stuff.
http://imgur.com/gallery/iRNGlpOGoes to show that he's neither David nor Brad.
Interesting Stuff.
http://imgur.com/gallery/iRNGlpO
Goes to show that he's neither David nor Brad.
"...All the marketing, videos and posts by the company in question still show that they do not have the necessary understanding of battery chemistry which is needed. If they interchangeably mistake voltage for power than this might sadly be enough to fool venture capitalists but it will not help their product at all.
Yes it is amazing that you can develop a boost converter with such a small footprint nowadays, but this does really not change the physics and chemistry which is responsible for a hugely nonlinear relationship between battery voltage and remaining energy in the battery. If you take a piece of copper and a piece of zinc and press it into a lemon, you get a battery with quite a high voltage, but there really is not much energy which could be extracted this way. The same is true for the chemistry of a regular AA battery: the voltage is determined by the chemistry and the energy stored is determined by the amount of remaining metal and chemicals.
Also, as Dave Jones brilliantly explained lately, the current you need to extract from the battery to deliver the same power from the boost converter, rises towards the very end of the lifetime of a battery, making the internal series resistance more and more working against you.
There is no significant energy left in an alkaline AA battery, once the voltage has dropped below 1 V, even though this is still 67% of the original voltage - but the anode metal is consumed at this point!
There is only one party here who really wants to make money from this story, and it's neither the battery manufacturers, nor is it Dave Jones.
Uwe Zimmermann,
PhD, Senior lecturer in electronics @ Uppsala University"