EEVblog > EEVblog Specific

EEVblog #751 - How To Debunk A Product (The Batteriser)

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ez24:
1. What's the going rate for a professor?  In the 70s one asked me for $2000 (under the table) in order for me to sell my product at his school and I did not want to pay it, so I lost my business.  And to be honest to this day, I wonder where I would be if I had paid him the money.  Professors are people and like people, some can be bought.

2.  The last video shows them telling people it is to be placed on a dead battery, so depending on the cost, I assume most will be happy to just get a few more minutes of use out of a battery (especially if they do not have a spare).

My guess is they will drop the 800% crap.

lewis:
If I was designing this thing I would only have the boost converter operating when the battery voltage dropped to, say, 1.1-1.2V. That would drastically improve system efficiency by negating almost all the quiescent current when the battery is fully charged. It's not difficult to do, turn the lower MOSFET off, and keep the synchronous MOSFET on (it would need one hell of a low Vgs).

I can see this improving battery life to some extent, maybe not quite the 800% claimed, but probably enough to pay for itself a few times over during its lifetime given its low cost. Which in my book makes it a fairly decent product, worth a punt.

Point taken about battery life being a valuable marketing feature so manufacturers would include a boost converter in their products anyway. But manufacturers can 'exaggerate' battery life claims for free, it costs money to put boost converters in products.

ivan747:
I have a better idea, an actual improvement on this product. Instead of having it supply 1.5V 100% of the time, just let the DC-DC converter bypassed until the battery drops below, say 1.1V, then start the boost and keep the voltage on 1.1V until it drops dead. It's basically artificially modifying the discharge curve of the battery to take advantage of the energy at low voltages.

I, Ivan Veloz hereby claim my invention to be mine.  ;D Oh snap!

lewis:

--- Quote from: ivan747 on June 06, 2015, 07:37:58 pm ---I have a better idea

--- End quote ---

Beat you to it

ivan747:

--- Quote from: lewis on June 06, 2015, 07:40:53 pm ---
--- Quote from: ivan747 on June 06, 2015, 07:37:58 pm ---I have a better idea

--- End quote ---

Beat you to it

--- End quote ---

Oh snap! Ready for some collaboration?  ;D

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