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triplesilk

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  1. Just for fun, I measured the block of 4 cells again. I get 3.43DC and 0AC. The cells seem to be connected in funny ways though, depending on where I put the multimeter points on the main block I do get something for AC. The annoying thing is that new batteries are expensive and I'm pretty sure that lots of the ones that claim to be Samsung aren't really.
  2. Wow, I did spend a bit of timing learning about this stuff but this is way above my head ;-) I need to get more up to speed on this stuff. Just to confirm, there is only one connection to and from the battery - a yellow connector with thick red and black cables either side. The charging cable going into the motherboard (or whatever it's supposed to be called) and not straight into the battery. Just checked the battery again using the red and black cables again and I get 17.5V DC and 23.9 AC. I just tried to test a block of 4 cells - these sort of flop out so I can get to it. Using the metal bits by the white cables I get 3.4V. I guess that is about 20% of the overall reading for 20% of the cells.
  3. Actually, when I take off the layers of plastic and paper it looks like below. Not sure where to stick what to be honest so the next issue is what replacement battery to get!
  4. Thanks a lot Esaj, new batteries are expensive but if that's what it takes then there is no other option, I just didn't want to buy one and have the same problem once it needed charging. Given the battery seems to be dead, I may cut the plastic off and just test what I can as dmethvin suggests given that I'm keen to play around with the multi-meter ;-) Two things confuse me a bit, but both are probably me being dumb .. but: given that the power source is AC I wasn't sure what would be feeding into the battery. I think you are saying that it gets converted by the time it gets there to DC? I kind of thought I'd have no voltage reading from the input to the battery with the charger not plugged in. I guess this is the result of some energy stored in a capacitor or something like that?
  5. Thanks, that might be a good idea. One thing that I thought was odd was that the battery didn't just stop - I got a low battery flashing light, so charged and the battery ran for a few seconds, then I charged again and eventually the hoverboard won't turn on. This seems just like the battery running down as it should, without any charge getting in when I tried to charge. Does that fit in with what you are saying?
  6. Right, I've had a go - I wonder if anyone can help me make sense of this lot. I took the battery out and tested using a multimeter. I assume this is DC - it gives a reading of 17.6V (which seems very low). The AC reading is 23.9V but I assume that this is meaningless? I've attached the 17.6V reading pic, and also a page from the stuff that came with the hoverboard that has battery info. In terms of the input, I didn't plug in some of the connectors that I had to take out to remove the battery when testing this. A picture is attached that shows how I tested the readings from the yellow connector that attaches to the battery. For a DC reading I seem to get 41.8V, no matter whether the power is on and the charged plugged in. For AC, I get 91.8V when the power is on. With the power off it drops slowly (I think it gets down to about 78V or thereabouts eventually). If anyone can make sense of this lot it would be great!
  7. Wow, thanks for all the help. I'll have to get one of those meters, do some reading (sort of general self-improvement), and then re-read that and hopefully it will make perfect sense to me ;-) I did just come back to post a mini brain wave I just had, but I think you are suggesting the same thing - ie test the other end of the charging cable (the other side of the yellow connector) as well. I'd be a bit nervous to test anything with the socket on, but if I'm confident by then of how the things work and I wear goggles and gloves then it should be fairly unlikely that something awful would happen? I just wish I did more of this stuff in school, or if it was covered I wish I concentrated more!
  8. Honestly, all I have is battery info and all sorts of import stuff about that. No manual or anything, but I'm pretty sure that flashing amber or orange is normal for charging when the thing is on for this model. It does sound like the charge is not getting through as you say, and I'm at a loss as to what to do about it ;-(
  9. Oh blimey, that looks like a scary moment there! I may be being dumb here, but you have two probes and two holes in the battery connector. Was that issue the probes being in the incorrect way around, or the settings of the multimeter not being correct? I have a fair suspicion that the battery has nothing in it, but you never know. Even if it is dead I guess I won't know whether it's just a faulty battery or whether there is something wrong with the charging part. All I can really see is that the wires and connectors look fine.
  10. Just looking at Google, digital multimeters are pretty cheap and look like useful tools. I was thinking that I can get one, take the hoverboard battery out, and stick the two probes of the multimeter in the two battery connector slots (of the yellow connector) and I should get some kind of measurement. Can anyone let me know if this should work and give useful info about the battery?
  11. Thanks, the thing is I'm in the UK and the delivery costs + repair costs would barely make it worth it. I'm just wondering whether it's worth buying a new battery. I've already taken my one out and put it back, and it's very simple to do. Another option may be to buy something that allows me to test the battery? I don't mind spending a few quid on something that I may be able to use for other things over the years.
  12. Thanks....I was fairly sure that the charger was OK but I could be wrong. Both the old and new chargers state that the output is 42 volts (it's a 3A plug so should be plenty). I've had a good look inside and all connectors look OK but I may be missing something :-( In terms of lights, green = good, red = battery low, orange = charging. But, the manual was pretty useless and in Chinese. As far as lights go, nothing is out of line, it's just that the battery can't get charged. It's fairly easy to get the battery out, so I was wondering if I could try to charge some other way (just as a test) but I'm guessing that's probably quite tricky?
  13. Hi, I wonder if someone can help me. I have a hooverboard (from China) and it's always worked perfectly, though we've not used it much. However, I have encountered a problem..... the battery does not retain a charge, the first thing I noticed was that after charging the battery only lasted a very short time (now I think that there was no charge applied and the battery was just depleting more each time); if I plug in the charger, I get the correct flashing amber light (at least I think it's correct); but no charge is retained; now, if I unplug the charger the hoverboard won't turn on (so that the battery is pretty much empty). I have tried a new charger (which I didn't mind buying as the charger I had didn't have a fused plug), but this has the same effect. There is only one way to plug in the charging cable, so I don't think that is the issue. I have taken the two plastic covers off and nothing obvious is wrong (no cables are loose and all connectors look OK). It seems to be that either the battery has just broken, or that there is something wrong with the charging mechanism (does the charging light mean anything here?). Anyway, some pointers as to what I should check for would be appreciated.
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