EEVblog #789 - Batteriser Monkey BUSTED!

Dave shows why power supplies are no different to batteries when determining cutoff voltage, busting the claim of Batteriser using their own monkey experiment.
It shows the incorrect method used by Batteriser to come to their false conclusion.
Discharge testing of alkaline batteries is performed, and correct probing of the monkey toy shows that the cutoff voltage with both batteries and the PSU are identical, and does take into account the electrochemical ionic internal resistance of the battery.
Dave explains why using a PSU is the standard industry technique for measuring product battery cutoff voltage.
Also discussion on ionic resistance recovery graphs and energy density in a battery.

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[andrewcleon]

In the Batteriser video the monkey never stopped working! Just the toy did.. Get your facts right dave!

[LazerLord]

"Just a quick follow-up video"

26 minutes long. Not that I'm complaining.

[ForViewingOnly]

Batterizer are obviously monitoring Dave's channel closely because Dave never gets this many thumbs down. And yet all of the comments here support Dave's argument (and science also supports Dave's argument).
A few years ago you could buy subscribers and votes, and you probably still can. It makes me wonder if Batterizer are buying thumbs down votes! Either that or they're getting all of their investors, friends and family involved.

[daveleitz]

Is the economy so bad that people can't afford batteries? This Batteriser product seems to play into the common misconception that you can get something from nothing, aka, a free lunch.

[Mickice]

Someone at Batteriser probably thought this thing was going to make easy money, then Dave showed up, lol.

[fdk]

The best test you could do is to test their actual claims. Stick some fresh batteries in a device, let's say an mp3 player, measure how long it plays for until it's dead and then stick the batteriser sleeve on the batteries and measure again. They claim they you should get up to 8x the play time using the sleeve. I doubt you will even get 8 minutes.

[yoksel]

Your video does not count comparing to theirs. There is no soothing music behind your voice, so it is not convincing at all.

[romainf]

You can't make yourself clearer than that!
I worked for many years with batteries (robots, and energy harvesting). And determining the amount of energy left in a battery is an approximate science (which models and Coulomb counters have helped to get more accurate, but it will never be exact).
Thanks for that crystal clear video!

[moondeck]

They are probably gonna end up saying their instruments were off

[mkemhewz]

I love the clip of Julius Sumner Miller you put in there, I haven't thought about his shows in ages...
His experiments and demonstrations really cemented the lessons in your mind, his manner of investigation was infectious.

[SlotGamer]

I first saw the effects of how batteries work as a 5 year old, had a flashlight, it went flat.. Turned it off for a minute BAM started working again! well for like 30 seconds!

[sciencetestsubject]

And now a moment of silence for probes' battery hole, he really took one for the team.

[ToumalRakesh]

Can't some of the US folks here file a FCC complaint about misleading advertising and fraudulent claims?

[CH_Pechiar]

So, with the Batteriser the batteries are more prone to leak? Another downside?

[HardDiskLover]

It would also be bad idea to use the Batteriser in a product that shows a "low Battery" warning since this circuitry only measures voltage and not current. The Batteriser always boosts the voltage up to 1.5V that circuitry would not detect a "low battery" and never show the warning. It would just continue operating until the current gets too low to actually operate it. This would be critical for Remote controlled vehicles or devices that use a battery as a backup to store data.

[IvoTrausch]

Comment from a person who actually owns a Batteriser (please read whole comment before trolling...)
All the videos Dave did about this thing made me so interested that I actually, just to try it out, bought two batterisers. They were 2€, and I was curious, so...
What I could find out:
1) They actually work. Many people think that it's just a metal bracket, but they do what they are supposed to do.
2) They (mine) do work down to 0.55V. That's pretty cool for a boost converter, and yes it is a normal boost converter we all have seen at some point in our life, though it's an impressingly small one.
3) Under 0, 8V, there is not a huge load of energy left in a battery (if any at all), so 800% is pretty optimistic. It is even very VERY HIGHLY Actually, I didn't notice any change at all in runtime.
4) Anyways, I found an actual use for these things (believe it or not!) and it is as obvious as boring. I have them in my old MagLite with the oldfashioned incandescent halogen bulbs. The one thing that really annoyed me about that flashlight is that when the voltage drops it gets dimmer. The batteriser does, surprisingly enough, effectively prevent on that. But, till now, that's about the only use I found for it, and because I also own a way more efficient LED flashlight...
5) I am still waiting for ElectroBOOM trying to electrocute himself with 100 batterisers with depleted batteries.

[vitormhenrique]

I love when you start: "just a quick...." and here we go for 30 minutes!!! As aways, great video!

[davidturner]

I have learned so much from you today. You are a fantastic presenter and teacher. No matter what never stop doing what you do!

[FFcossag]

If there's one thing about this that's misleading, it's the approval rating of this video. 500 dislikes in 12 hours, and then no dislikes at all. I think someone's playing it dirty.

[spikester]

I would love to see a teardown of one of those Chinese clones of the BK Precision Electronic Load and compare it with the real thing.