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| Batteroo testing |
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| PeterL:
--- Quote from: PA0PBZ on December 22, 2016, 02:41:57 pm ---Anyone care to guess why the result is so bad? Simply looking at the efficiency does not explain it. --- End quote --- I think one thing that explains it is the way the batterisers loads the battery. Without the batteriser there is a constant load on the train of .2 Amp. With it say we can assume a pulsating load, judging from the voltage ripple we have seen. Let's say the load is now 2 Amp for 10% (neglecting the losses in the batteriser) This has a big effect on the Powerlosses in the ESR: Without Batteriser: PESR = 0.22 x RESR = 0.04RESR With Batteriser: PESR = 10% x 22 x RESR = 0.4RESR So we have much more losses in the ESR due to the batteriser. It would be interesting to see the current waveform on the input of the batteriser at different charge levels of a battery to check this theory. |
| StillTrying:
--- Quote from: FrankBuss on December 22, 2016, 03:04:59 pm ---Current is about 250 mA at 1.5 V and 210 mA at 1 V. --- End quote --- That's about 1/2 of what I expected. Is that with the train just held in hand, or driving itself around the track? 200mW-300mW doesn't seem enough input power to drive a wooden train around a wooden track. data.energizer.com/PDFs/E92.pdf |
| LabSpokane:
--- Quote from: FrankBuss on December 22, 2016, 03:28:59 pm ---The MP3 player test is done. I used the method Dave described, just filming it, no measuring, to actually see when it turns off (looks like there was no low battery warning, maybe voltage jumped a bit). With sleeve a fresh battery worked 17.9% less long than without the sleeve and the additional time after using the sleeve on the dead battery from the first test with the MP3 player (which had a few days to recover) was 13.4 %. --- End quote --- A test of runtime using recovered battery with *no* sleeve is also needed. |
| samgab:
Thanks for the Youtube video with the toy train Frank. Excellent real world demonstration, shows simply and beyond a doubt that there is no advantage - rather a disadvantage - to using the sleeves compared to a battery by itself. Looking at the train on the round track like a clock, you can even see that the train runs faster throughout the test with just the bare battery. One simple real world test has utterly exposed the Batteroo as total bullshit. |
| samgab:
--- Quote from: onlooker on December 22, 2016, 03:24:18 pm --- --- Quote from: FrankBuss on December 22, 2016, 02:17:33 pm ---Right, I guess it might be longer, too. But doesn't matter much, the interesting result is that the advantage is 3% instead of 300%. --- End quote --- I understand your argument. I am just curious whether that 3% extra turns out to be 0% in real term. I think your test results should be indicative for all direct battery powered motorized devices and "toys", including the monkey ... The other device types of interest are those with built-in DC-DC convertors and those with pulsed power consumption. The interest is mainly on checking all different predictions made throughout the 300+ pages. --- End quote --- Yes, I can almost guarantee that if the bare battery from the test with bare battery had been left to rest for an hour and reinserted again bare, without the batteroo, it would have run for at least as long, probably longer again than it did with the batteroo on. As a kid that was always my method with dead batteries, swap them back and forth giving them time to rest and the toy would always run again for a good while. You'd actually get a better increase in life from the "dead" battery by biting it hard and reinserting it than by putting a batteroo sleeve over it. Seriously. |
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