All Questions
Tagged with 18650 battery-charging
10 questions
0
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2
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How to charge two 18650 cells in series with a 12 V solar panel for an ESP32 and NPK sensor project?
I'm a beginner and I'm trying to figure out how to charge two 18650 cells in series using a solar panel with a 12 V output. My goal is to power a circuit for an NPK sensor that operates at a voltage ...
- 101
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2
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662
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Can I charge my 3S2P 18650 battery (12.6v) with a normal 12v power adapter if I use a BMS with built-in balancing+protection? [closed]
First off, I would like to stress the fact that I am no electrical engineer or anything of the sort, just a hobbyist that is into this kind of stuff. So please bear with me, as I know a few things ...
9
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3
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18650 Cell (8800 mAh) accepts only 300 mAh on recharge
My ESP32 device uses a new 18650 until it is down to 3.3 V.
My charger draws current until it is again at 4.2 V. Its indicator shows that 330 mAh has been loaded. This is surprisingly far off the 8800 ...
- 233
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How to add charging to LED light running on 2s 18650?
I am new at this and was hoping for some guidance.
I currently have this setup for testing-
2s 18650 7.4V --> Constant Current Boost Regulator (XY-SJVA-4) --> 20W LED
I can't seem to find clear ...
- 11
5
votes
2
answers
903
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Charging two 18650 cells connected in series?
It is easy to charge a single cell or cells connected in parallel with a single TP4056 module.
This question shows why this can't be done with cells connected in series (short circuit of the cells).
...
- 10.8k
0
votes
1
answer
86
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When I test a 18650 Li-ion cell, why do I get two different values of capacity for charging and discharging?
I'm trying to test the capacity of 18650 cells. I don't know which numbers are important. I get different results on the same cells from discharge and the charge.
For example on same 18650 cell:
(...
- 9
2
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5
answers
1k
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Is this a good way to make 2S 18650 battery cell while parallel charging?
I want to make a battery pack with 7.4 volt output and I want to charge them with 1A each so I connect them parallelly and input them with 5A 6A DC adapter. (No charging and using at the same time) Is ...
- 21
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1
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208
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I just built an 18650 battery. I need to know if I can use this power adapter/charger for this BMS [closed]
I just built my first battery. I need to know whether I can use a 12 V, 1.8 A power supply that I fished out of a box of electronics I have. It was for an Apple router or something.
The battery is a ...
- 1
0
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1
answer
177
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How can I use two 18650 cells with a 5 V, 4 A load?
I was planning to use two 18650 protected batteries (each comes with its own internal protection circuit against overcurrent, overcharge and undercharge) to power a load of 5 V, 4 A. Their maximum ...
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BMS shows wrong voltage, changes to 0 V under load
I made a 24 V, 4400 mAh lithium-ion battery using 18650 cells connected in a 7S 2P configuration.
When I check the pack output voltage without the BMS it's around 21 V (very low, undercharged). When I ...
