Tagged Questions
0
votes
1answer
53 views
Charging 12V/4A battery
Can I charge a 12V/4Ah sealed rechargeable battery with a 13.5V/500mA charger? If so, how much time would I need to charge it to 100%? If not, how can I charge the battery?
1
vote
1answer
96 views
Can a phone battery be used to power Arduino or Motors
I was wondering whether it would be possible to use a rechargeable battery from an ordinary cell phone to power some electronics such as a motor shield for Arduino?
Can that be done and if yes then ...
2
votes
1answer
261 views
directly charge a laptop battery / using laptop battery for projects
I've seen a couple similar questions, but nothing exact. I'd like to know how I can charge a laptop battery directly, meaning without the laptop. This would be a battery still intact, in good ...
-1
votes
1answer
107 views
How many lower volt charges are in a 12V/8A dry cell
On a long rafting trip I will be charging a cell phone (charger output = 5.1V/1A) and a head lamp (charger output = 4.2V/1A) using a 12V/8A dry cell battery as the power source. The cell phone will ...
1
vote
2answers
149 views
Why using short traces with the MCP73831 LiPo charger?
I'd like to use an MCP73831 to charge my lipoly battery. In section 6.2 I see they recommend short wires to the battery.
I bought my battery with wires, 20 gauge and approximately 30cm long. The ...
1
vote
1answer
203 views
charging battery while under load
my question applies to NiCd/NiMh battery types.
Can I simultaneously charge & discharge the battery? Might it cause any harm to it?
I presume there will be opposite movements of the charged ...
1
vote
0answers
89 views
what is the best way to charge a capacitor bank from an SLA battery
I need to charge a capacitor bank of 25 2.5v 55 farrad capacitors from a 2v 200Ah gel cell SLA battery, and modify the discharge time so that it discharges at 150Ah. I was wondering what the most ...
2
votes
2answers
479 views
3.7 Volt external battery to charge a another 3.7 Volt Phone Battery?
I would like to know if a 3.7 V external Battery would be able to charge a phone battery of the same voltage. From my understanding, the batteries would charge each other until the charge in both the ...
0
votes
1answer
151 views
MCP73834 disintegrates after a couple of hours
For my first attempt at Li-Po charging I chose the MCP73834-FCI/UN for availability, it has an output current of 1A. I set it up the example circuit in the datasheet and used an 6Ah battery to test ...
3
votes
1answer
1k views
Can I recharge batteries with a normal AC to DC transformer? [duplicate]
Possible Duplicate:
Charging 3 AAs in series
My batteries charger is not working, but I have an AC to DC transformer that can output different voltages.
If I connect two 1.5v ...
2
votes
1answer
444 views
Battery charging questions Parallel charging and battery balancing of LiPos
I'm having a long discussion on an RC board regarding LiPo parallel charging.
The basic crux is that my understanding of how charging works is something like this:
Charger Line voltage of x(8.4v in ...
2
votes
3answers
5k views
How to Calculate the time of Charging and Discharging of battery?
How do I calculate the approximated time for the Charging and Discharging of the battery? Is there any equation available for the purpose? If yes, then please provide me.
3
votes
3answers
1k views
Is it safe to run and charge a deep cycle battery in an enclosed space like a bedroom?
I'd like to experiment with running a small server (5.5 watts) / 85AH deep cycle battery / charged via 30 watt solar panel from my bedroom.
I generally keep the window open, but want to make sure ...
0
votes
0answers
285 views
Can anyone recommend aUSB charging circuit that gives 600mA charge rate for a mobile device?
I need to build a 5V 600mA USB charge circuit for a device I want to build for my hobby project. Does anyone have a simple circuit design I can use to do this?
It will be charging a Lithium cell with ...
0
votes
6answers
2k views
How to charge Laptop Li-ion Battery cells manualy?
I have received some Li-ion batteries which were originally used in Asus A2 Laptop battery original one and I would like to know if it is possible to charge each cells independently with some device ...
7
votes
3answers
5k views
How can a car battery be charged by dynamo (or is it an alternator?) at the same time it is being used by the car components?
note and question
* Is it an alternator or dynamo?
I am not an electrical engineer and neither have any core knowledge but, this is a simple procedure of car ...
8
votes
4answers
795 views
What are the basics of making a rechargeable battery pack?
We have a device that runs off of a AC adapter, or a pack of 8 AA batteries. Since in normal use we use both, it would seem to make sense to have the battery pack recharge while using the AC adapter - ...
8
votes
6answers
3k views
Inductive Charging
I've build a small three wheel robot with an Arduino Mega to drive the thing.
I'm looking to keep this bot mobile as much as I can without needing to interact with it for charging etc.
For the moment ...
14
votes
4answers
616 views
