Electronics > Projects, Designs, and Technical Stuff
Batteroo testing
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razvanme:
@Frank great job, you know you will be remembered as the first one that tested the sleeves  :-DMM , children will sing about you in the future  :-+

I like the crazy scientist mess on your desk  :)

The values seem correct at first sight, the output current increases in steps of 10ma so the load is working correctly, the input / output voltage is constant, seem like good tests.

Based on the data you provided the efficiency of the controller is between 77% and 88%, it varies but steadily increasing with higher voltages. Maybe for a higher current it will do better.
EEVblog:

--- Quote from: FrankBuss on December 21, 2016, 04:04:57 pm ---The train test is done, pretty embarrassing for Batteroo :) Will make a nice video now and upload it.

--- End quote ---

 :-DD
Toys were supposed be one of their big things.
StillTrying:

--- Quote from: razvanme on December 21, 2016, 07:43:46 pm ---Based on the data you provided the efficiency of the controller is between 77% and 88%,
--- End quote ---

It seems to "use up" the 20%(or is it 800%!) that's supposed to be left at the end, and will be worse with the higher internal resistance <1.1V. At least the battery meter will still work sort of.
FrankBuss:
I need faster internet, even with timelapse still 25 minutes and GB video. But here is the entry for the spreadsheet:

Product description and model: Brio Battery Powered Engine, Art# 33595
Contributor Name: Frank Buss
Batteroo Type AA/AAA/C/D: AAA x 1
Battery Brand/Model Used: Energizer Alkaline Power
Battery Fit? / Issues?: Tight, not easy to insert
Normal battery life from fresh (No Batteriser) Minutes: 127
Normal battery life from fresh (With Batteriser) Minutes: 59
Batteriser Improvement % for fresh batteries: -53.54 %
Extra time added on "dead" battery with Batteriser. Minutes: 4
Batteriser extra run time in % on "dead" batteries": 3.15 %

And some more numbers: Quiescent current at 1.5 V is about 2 uA. Don't know how to measure the switching frequency, but output ripple is really bad. With 1 k load:



With 100 ohm load:



I wonder when the first complain about hissing audio product appears on Indiegogo.

I'll finish the MP3 player test, but don't know if it makes sense to test a flashlight. And the edges look pretty steep, might have EMV problems.

Who wants the two sleeves next? One will be shipped with the construction with the battery holder, for easy measuring. Would be cool if someone with ESD/EMV equipment could take a look at it, or verify the efficiency results with a non-bricked eload, or test the current limiter.
Kean:
Wow, that is pretty poor results.  Thanks Frank!
Looking forward to seeing more tests by someone else for comparison.
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