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You could put all 5 batteries in series and use an efficient buck topology DC-DC converter to get you back down to the 11V. But I'm guessing that you don't have experience designing and building DC-DC converters?Biycchu said:Hello Friends,
Please help me to setup 5 [18650] Li-Ion battery of 11.1 volt
I describe everything in image.
Please check attach file
Thanks in Advance
Sir I don't want to spend money spend mony on multimeter & dc to dc convert. I already bought a soldering iron which not heating perfectly and seller refused to return it. Also I bought a 12 volt 9 watt bulb dc which is working correctly.berkeman said:You could put all 5 batteries in series and use an efficient buck topology DC-DC converter to get you back down to the 11V. But I'm guessing that you don't have experience designing and building DC-DC converters?
Um, how did it get damaged?Biycchu said:I have insert all of 5 18650 battery from my damage power bank.
You can only parallel-connect batteries when they are well-matched. They would need to be the same age with the same charging history.Biycchu said:I know i am a nonsense guy. Please check my 2nd attach file. Help me once again and I will not ask you again for any kind of help in this post.
I have 5 batteries sir. In the above reply Mr. berkman said to arrange 1 another battery that's why I wrote 2nd note.Vanadium 50 said:Do you have 5 batteries or 6? Sometimes you say or draw one and sometimes the other.
Oh, and I am sorry your soldering iron is no good, but we're really not responsible.
All of batteries are ok. Only circuit board was damaged then I was think to convert it into dc light. Also I have a 10 watt solar panel and I am using it to charge my 11.1 volt batteries.berkeman said:Um, how did it get damaged?
berkeman said:It seems like you are trying to do something pretty dangerous. What are you doing with these Li-Ion batteries? Are you familiar with the fire risk when working with batteries, especially Li-Ion batteries?
I must repeat the warning about connecting batteries in parallel unless they are properly matched. They can destroy each other and overheat. You could well be better off using just three at a time in series. If, as you suggest, you have no meter and you don't really want to get involved with additional circuitry then that may be the best solution, although it would mean half the available mAh.Biycchu said:I know i am a nonsense guy. Please check my 2nd attach file. Help me once again and I will not ask you again for any kind of help in this post.
To charge 18650 batteries, you will need a compatible charger. Make sure to read the instructions of your specific charger before use. Generally, you will insert the batteries into the charger and plug it into a power source. The charger will indicate when the batteries are fully charged.
No, it is important to use a charger that is specifically designed for 18650 batteries. Using an incompatible charger can cause damage to the batteries and pose a safety hazard.
The charging time for 18650 batteries can vary depending on the charger and the current charge level of the batteries. On average, it can take 2-4 hours to fully charge a pair of 18650 batteries.
It is not recommended to leave 18650 batteries charging overnight. Overcharging can lead to overheating and potentially cause a fire. It is important to monitor the charging process and remove the batteries once they are fully charged.
Some devices may have a USB port for charging 18650 batteries, but it is not recommended. USB ports may not provide enough power for efficient charging and can also cause safety hazards. It is best to use a compatible charger for 18650 batteries.