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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) .
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
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
1
vote
Understanding Battery Controller
Looks like a David Smith has them all except number 10 which is a feature in some solar controllers where they allow you to connect a load (usually 12 volt lighting) directly to the solar controller. …
- 2,490
1
vote
external battery claimed iPhone 6 charges versus my calculated charges mAh vs Wh and voltage...
Your calculations look correct at 8 charges, assuming that efficiency is 100%.
Your 15000 mAh pack is at a nominal 3.7 volts, but outputs at 5 volts to charge your phone. It uses a dc-dc boost to ge …
- 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
0
votes
Battery Charging Time Computation
Botnic gives a good simple answer. Here is the additional information that makes the answer 'complicated'
I assume that you are using lead acid battery, but the same applies for lithium ion. They …
- 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
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
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.
…
- 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
0
votes
Accepted
Why do laptop batteries and chargers differ in voltage output?
The battery's ratings are it's nominal voltage and capacity ratings. The charger's ratings are the voltage it will supply and the maximum current that it can supply.
So the battery ratings don't te …
- 2,490
1
vote
How to make 5V 650 mA on a summer camp?
First of all, how long must the computer be on? You mention that it must be activated every 108 minutes, and I assume this means it must be turned on every 108 minutes. Then for how long does it get …
- 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
0
votes
Accepted
Best battery type for outdoor equipment
Your best choice is lead acid, or a “car battery”. You can get them in much smaller sizes than for cars, and can get 6volt versions. They tolerate wide temperature fluctuations reasonably well.
Lead …
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