AA Li-Ion battery charged with USB-C
Hello
Below are photos of the inside of an AA battery with a lithium-ion cell. The link itself has no visible marking. There was a problem with charging from new, so the whole thing was dismantled. As you can see, the electrolyte was spilled and the connections were corroded. The electronics themselves seem to be functional and may be used in a wall clock with an 18650 cell.
Inside there is an LC9205D converter. According to the description on the label, the current capacity is 140mA.
Description from the Chinese website:Quote:LC9205D is a three-in-one integrated chip used in 3.7V to 1.5V lithium dry battery. Mainly intended to replace traditional AA alkaline batteries and 1.2V AA nickel-metal hydride batteries.
The LC9205D chip achieves a high degree of integration. One chip completes the charging, discharging and protection functions of a lithium battery.
The peripheral circuit requires only two capacitors, one resistor and one inductor.
1. Highly integrated, three in one;
2. High reliability, under voltage, overcharge, short circuit, overheating and lithium battery protection;
3. Very low self-discharge, less than 6uA;
4. With NTC temperature control to better protect the battery;
5. Supports maximum discharge of 3.5A to meet high power discharge requirements;
6. Streamline peripherals Total production cost is reduced by up to 50%
The measured output voltage is 1.51V with almost imperceptible ripple.
The other three work. Due to the low output current, they can be used in remote controls and watches. Electric toys with motors have not been tested, so it is not known whether the system has any overcurrent protection.
There are also AAA versions with an output current of 100mA
Regards
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Comments
Add a commentIs the output voltage cut off automatically after discharge, without warning or lowering the output voltage beforehand? [Read more]
These types of AA sticks are advertised as follows: https://obrazki.elektroda.pl/4094904100_1705436406_thumb.jpg Which suggests keeping the voltage at 1.5V for cut-off. The 100% charge signal is... [Read more]
Is the output voltage cut off automatically after discharge, without warning or lowering the output voltage beforehand? [Read more]
I`ve written this before, but I`ll say it again: In the cell voltage range of 4.20 V ... 3.15 V, the converter output is 1.51 V In the cell voltage range of 3.14 V ... 2.80 V, the converter output is... [Read more]
The battery with the converter and charger is a power bank. :D The cell mentioned in the description is a secondary electrochemical cell - a battery. :D Nice for powering something from one battery.... [Read more]
There are cables available with several USB-C outputs https://www.amazon.com/GELRHONR-Splitter-Charging-Compatible-%EF%BC%884FT-1-25M%EF%BC%89/dp/B08GY7FBHZ so if anyone he often wanted to use it, there... [Read more]
The set includes a cable with a branch for 2 pcs. These branched cables are dangerous in certain cases. When connecting one output to a device with the fast charging protocol, a voltage higher than 5... [Read more]
The cable must also support PD, so if they didn`t mix it up, there shouldn`t be a problem. [Read more]
Older protocols, e.g. Qualcomm Quick Charge 2.0, do not pay attention to the cable type. https://blog.oxplot.com/quickcharge/ https://en.wikipedia.org/wiki/Quick_Charge [Read more]
Thanks, they actually figured it out cleverly. Maybe someone with an electrode will be tempted to open such a splitter. Maybe there`s some security inside. [Read more]
Thanks! I have something like this, only in the R20 version in a gas heater, just yesterday the diode in the stove started flashing, indicating that the power supply voltage was too low. This surprised... [Read more]
They are not suitable for such applications anyway. Current efficiency too low. Besides, does anyone else have such a battery-powered camera? After all, today`s smartphone will crush it with the quality... [Read more]
They are not universal, but they are certainly perfect for what kucy7 writes. If there was no demand, there would be no supply. Out of curiosity, I searched a bit on Aliexpress and there are those with... [Read more]
Demand/supply - this is simple manipulation. The manufacturer forces people to buy a product with a lower capacity than alkaline cells or NiMH batteries. It also has a shorter lifespan than NiMH, so only... [Read more]
When it comes to capacity, it`s not entirely true. Approximate capacity in size AA https://obrazki.elektroda.pl/6895243900_1705563733_thumb.jpg As for durability, time will tell. As you can see... [Read more]
The average user doesn`t want to bother with charging. The charger is a big expense and you have to think about it. These products are targeted at such users - they already have chargers, they won`t think... [Read more]
I read opinions about these batteries and it looks very bad https://allegro.pl/oferta/akumulator-xtar-14500-1-5v-3300mwh-li-ion-4-szt-14508559254 https://allegro.pl/oferta/kp-icr14500-226pcm-2260mah... [Read more]
Usually, such batteries in remote controls come in pairs. Why didn`t anyone come up with the idea of having only one 3V battery + a jumper battery? [Read more]
What problem would such a battery solve? [Read more]