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Results tagged with battery-charging
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user 36526
Please specify the battery type in your question. Include chemistry (e.g. lead-acid, Li-ion), voltage, capacity (in A·h or W·h), number of cells and how they are connected (series or parallel) .
4
votes
How to gauge safety of cheap Lipo batteries?
I have randomly purchased several of these relatively cheap lithium ion batteries from ebay, originating from China. I have a fairly high quality battery charger/analyzer that I use to test these bat …
- 2,490
3
votes
Effects of continous slow charge on a battery?
With regardsto charging li-ion batteries, the above answer is completely correct, however,
Most phones control the charging of their batteries within the phone itself, and all we have to do is supply …
- 2,490
2
votes
Diy 18650 4s battery pack [How to charge, how to build?]
That BMS looks identical to one that I've used and it does NOT do balancing or proper charging. Just protecting from over current, over voltage and under voltage - all of which are very important.
Y …
- 2,490
2
votes
Accepted
How to design a lithium-ion battery pack?
Lots of questions! Instead of just pointing you to a certain IC or battery, I will try to answer your questions so that you can understand the concepts and pick or build your own battery.
What prec …
- 2,490
2
votes
Accepted
laptop battery cells measurement
What you are thinking of doing has been done successfully a lot of times. FIRST, read the answer above carefully, if you do not understand the li-ion batteries, do not do this, but if you are ok with …
- 2,490
2
votes
Is it bad to charge an iPhone 5S with an iPad Air's charger?
Take a look at the requirements for charging of each of your devices. If the iPad air's charger can supply at least or greater the wattage (or amperage) since they use the same voltage then yes the ai …
- 2,490
2
votes
Accepted
Charging Lead Acid Battery from dynamo
The dynamo will charge the battery as long as its voltage is higher than the battery's voltage. You are correct, as your battery approaches a full charge, it will be around 14 volts and the dynamo i …
- 2,490
2
votes
What C rating for 800 mAh Li-po battery is needed to support a 2.1 A charge rate?
The C rating is how fast your battery can be discharged or charged. The rating is often different for charging than discharging.
Let’s say your 750-800mAh battery is actually 800mAh to keep things ea …
- 2,490
1
vote
Using balancing charger with Li-Ion protected cells
Can your 2s charger not charge in normal or 'unbalanced' mode with the 3 wire balance connector not connected? Almost all chargers do.
So why balance charge your 2s battery? The TP4056 chips should e …
- 2,490
1
vote
Before storage why should a Lithium Polymer battery be charged up to only 40-60%
In general, if a Lithium battery is stored fully charged at 25 degrees celcius for one year, it will lose approximately 20% of its capacity. Apparently if they are stored at a 40% state of charge, or …
- 2,490
1
vote
Buck boost converter for lipo 6s charge info request
Do I need to limit the current progressively as the charge progresses? Yes. My understanding is that the battery will 'accept' lower and lower current as it nears the end of charge. You will need to …
- 2,490
1
vote
How do I make a circuit that charges two 3.7 Li-Ion batteries (in series) with a 5v input?
Yes, you can charge your batteries with the 5 volts.
1) You would need a boost converter to boost the 5 volts up to the voltage needed to charge the batteries, which would eventually be 8.4 volts.
2 …
- 2,490
1
vote
Charging High Cell-count LiPo batteries
There are very expensive $250- $300 chargers that do higher than 6s, probably closer to 10s, but not a lot to choose from and right now my memory is drawing a blank on their names, but they do exist.
…
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1
vote
Watts in Solar Panels
Don't forget that, although the higher wattage does theoretically mean you can charge more gizmos, you don't get to choose the voltage or amperage. The voltage and amperage are both essentially fixed …
- 2,490
1
vote
how to calculate solar panel size needed to run circuit
If I understand you correctly, you have only 5 x 5 inches for solar panels? That would translate to approximately 5 watts if I remember correctly (I will check that figure and edit if necessary). EDI …
- 2,490