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This site does allow questions on identification of components but we need to see the markings. You may need to remove it from the board and clean it up. Alternatively you could search for a service manual which has the schematic and then you just need the reference printed on the board to which component this is. You’d have to be very fortunate to have ...


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These colors are non-standard. Welcome to the bad news. Black and white are clearly ticker than blue and red, your first bet would be white and black to be power. You can use a voltmeter to distinguish between +/- . If the power brick is plugged to the wall and everything "floats", the voltage between black and white should be around 5V. The white ...


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The White and Blue are not D+/D- wires. They are likely CC1 and CC2 wires. Try to solder them as such to your breakout connectors if you want the charger to operate in standard functionality. If you want the charger to just output the default +5V, try to pull down one (or both) blue/white wires with 5.1k resistors to ground. Type-C ports/chargers enable ...


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You need to replace it with a battery of the same chemistry not just a similar voltage, the charging requirements of lithium cells is completely different to NiCd and NiMh cells for example. Get this wrong and you will have exploding batteries. As Olin lathrop mentioned you could assume a NiCd or NiMh cell. Bear in mind that although NiMh cells have higher ...


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So in short, what is the logic when deciding to use a dedicated charging chip? Obviously the behavior is well defined and it saves many hours of engineering, but for mass produced devices, it seems as if that would not be an issue. Of course it is an issue. Behavior that is not well defined leads to an unreliable product, which is generally more of an issue ...


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Thanks a lot for replies. I think i have to use different type chemistry of cell. because now project power supply and cell protection module cost will reach more than project itself. Even It has no space at all. I am again where I had started.


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No, you need a proper Li-ion battery charger to charge such batteries safely. Don't even try charging them with a generic power supply; it is dangerous.


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No it will not, you have to have circuit charges and monitors voltage, current and temperature within the batteries specification you also need to have at least one over current protection circuit at least, preferable with a fuse aswell.


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Since your fan did not negotiate any higher voltage, it was supplied 5V. That's the default for all chargers. It's probably a measurement artifact that you have seen higher voltages. For your LED project: The QC standard allows to negotiate higher voltages but – as far as I know – does not allow to negotiate higher currents. Since the initial voltage is 5V ...


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Can we eliminate CV mode and use it? Yes. If use like this Any battery degradation/life cycle/capacity issues? You will be at about 70% of maximum capacity, and have a huge increase in cycle life, see the third table at https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries . Not discharging them below, say, 20% will also ...


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you can charge to 4 volts instead of 4.2V no problems, but why ? Charging in CC mode up to 4 volts, and skiping CV mode will not charge your battery to its full capacity. Is this an issue or not ? If you want to reduce charge time, you just increase the current in CC mode instead. Say, your capacity is 2000mAh, then check battery manufacturer specification ...


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