Questions tagged [charger]

A device which controls the voltage and current being delivered to a capacitor or battery.

Filter by
Sorted by
Tagged with
-1
votes
2answers
630 views

Test car phone charger amperage [closed]

I have at car usb charger. It has 2 ports and is rated 2.1A when one port is used and 1A when both ports are used. I attached samsung tablet (N8000) witch requires 2A output. So, tablet isn't ...
-1
votes
1answer
423 views

Lead Acid Battery Voltage rises very quickly

I am working on a charger for the first time. m charging a lead-acid battery (6V) by supplying a voltage of 7-7.2V & 100mA. But the voltage rises from 6.10 to 6.30 in just 5-10 seconds. What ...
-1
votes
1answer
793 views

ReusingLithium Polymer battery from an Old Tablet

One of the projects that I am currently working on requires a backup battery source. I have 2 tablets with me that's that's dead (cracked screen) and the Asus one had a 4270mAh battery. I was trying ...
-1
votes
1answer
66 views

What is “ol plug-it-in” as a charge approach?

I'm reading an article which is about wearable smart watches. In the following context author says Sony SmartWatch 3 uses ol' plug-it-in approach for charging, I ...
-1
votes
2answers
1k views

Issue charging a 12V battery using solar charger

I bought a 12V solar charger for vehicle batteries, because I am usually using wall chargers and I wanted to give green technology a try. When I connect the solar charger to my battery, it shows 10V, ...
-1
votes
1answer
159 views

Adding AC adapter to solar powered device

I have a solar-powered LED number display whose rechargeable batteries have apparently died. I'd like to hook it up to AC power using a 3V adapter (i.e., cutting the leads from the batteries and ...
-1
votes
1answer
692 views

mobility scooter battery charger

I have a mobility scooter that I put a Raspberry Pi and Arduino on to make a robot. I left all the original electronics in place so I didn't have to buy a motor controller. I was able to charge the ...
-1
votes
1answer
89 views

What is happening when I apply 5V DC to the DC end of a 12V AC to DC adapter? [closed]

The question is in itself a little bit confusing but I will try my best. So I have a normal 12 volt (1 amp) AC to DC wall charger, nothing fancy about it. I use that to power a fan, which works great ...
-1
votes
1answer
106 views

what extra circuit to make a LiPo charger to a LiPo charger can sharing load?

As a (LiPo charger)(Charger A), I refer to this (LiPo charger can sharing load)(Charger B), this So, I have a LiPo battery with protection module. Can I just connect the LiPo and a LOAD in parallel ...
-1
votes
1answer
148 views

Learn to design cell phone charger

I have my final project for my undergraduate that I want to make a cell phone charger with: Output voltage: 5 V (constant) Output current: 0 - 3 A (can be adjust) The purpose of the current can be ...
-1
votes
1answer
114 views

Wiring this 2-cell battery controller to 1-output psu?

I need to take the controller board from a 2-cell battery (2 x 3.7v) to a single power supply (1 x 7.4v). The board has 3 wires, "B+", "B-" and "BC". The two cells are wired in series to "B+" & "...
-1
votes
1answer
89 views

If I added a Capacitor to this circuit would it charge both and would the charge led still work?

If I were to add a second capacitor to this circuit of roughly the same capacitance (120uf). Would this circuit charge both up completely, and would the LED still accurately depict if the combined two ...
-1
votes
2answers
211 views

Solar panel lipo and usb

I connect a 5v 5w solar panel a usb port and a 3.7v 2.5A lipo with pcb. If I connect a phone to usb port it doesn't charge, but if I remove the battery from the circuit, it does. I suppose it's ...
-1
votes
1answer
2k views

DIY 4*18650 Batteries charger with TP4056 paralel problem with how to balance it

days ago I did this project like the pic which is a DIY for 4*18650 OR 6*18650 (NOW I MADE 4 AND LET`S STICK TO IT) Sony vtc5a charger 3.7 v with new tp4056 with protection (copied from one youtube ...
-1
votes
1answer
69 views

Mobile Charging Input is DC Output is DC [closed]

I want to design a circuit for mobile charging. Input is Dc voltage: 0.77; Dc current: 0.44; Input should be stored for 24 hours in the battery. Output i need it for only 1 hour for charging ...
-1
votes
1answer
346 views

Custom Li-ion Power Bank for Surface Pro 4 and Smartphones [closed]

I'm building a Li-Ion power bank to charge a Microsoft Surface Pro 4 and for general purpose USB charging. The Surface AC power adapter output is 12v 2.58A. Depending on my battery configuration, I ...
-1
votes
1answer
138 views

18v nimh battery charger [duplicate]

For the 18V +/- NIMH battery pack (2 x 9V packs in series @ 200mAh) that I use to run my phono preamp, I need a simple trickle charge circuit. The LM317 IC seems to be the one that is used a lot. ...
-1
votes
2answers
70 views

In a power supply, the current is a constant or gives whats the component/circuit need ? [duplicate]

I everybody, sorry for my english :D . i'm a begginer of electronic and i'm learning a lot of electronic component, voltages, current and so on. My question is about a charger (phone charger for ...
-1
votes
1answer
228 views

Why do laptop batteries and chargers differ in voltage output?

As an example, my laptop's charger gives out 19,5V and 3.42Ah while it's battery gives out 11,1V and 2.2Ah, what's going on exactly?
-1
votes
2answers
493 views

Possible to charge a phone battery by using built in contacts? [closed]

Recently I had a Plum Coach Plus II handed down to me because a family member broke the charger port on the device. I managed to charge it after a few minutes of propping and plugging in the cable ...
-1
votes
1answer
473 views

POWER SUPPLY / CHARGER [duplicate]

I have a 14.4v NI CD power drill with a charger that outputs 18v 400mA (original charger for drill) but the charger supply lead no longer works. Looking to get a replacement but finding it difficult ...
-1
votes
1answer
181 views

Charging of Cell Phone Batteries and Electricity! [closed]

Does charging an already charged battery of cell phones/laptops consume electricity? Whenever my cell phone becomes fully charged while charging, it asks me to remove the charger from the socket to ...
-1
votes
3answers
3k views

Charging 2 12V batteries with a 19V 3.42A laptop charger

I was wondering since the voltage of my laptop charge is too high to charge one battery, it occurred to me if it could be possible to make a parallel or series arrangement to get my 2 12V batteries ...
-1
votes
2answers
304 views

Lithium 72V (2x 36V series) charging with double 36V charger for ebike project [closed]

Edit1: Voltage is wrong but here is a basic wiring diagram for a parallel to series changeover switch I found on internet closest to what I want. I want to 2 36v battery packs in series. I know that ...
-2
votes
3answers
3k views

Laptop charger: is 100-250V input an acceptable replacement for a 100-240V charger? [closed]

very simple question. A friends laptop charger is broken, so we're looking at getting a new one. The old one says - input 100-240V 50-60hz 1.5A output 19V 4.74A Looking online, there are a very ...
-2
votes
2answers
3k views

What does battery charger's current rating mean? [duplicate]

I am basically a software engineer but have some interest in electronics so this is probably a very basic question. I understand theoretically a battery or power source can provide as much current as ...
-2
votes
1answer
136 views

Electric shock in water [closed]

In my country, someone died recently due to an electric shock when their smartphone fell in a bathtub. I'm trying to understand what's going on the charger side when a poor quality cable used to ...
-2
votes
2answers
220 views

Old AMD portable charger [closed]

I found this device in my garage a few hours ago. It seems to be a very old portable charger, but I can't find what it's called or the model: The cables plug into a small jack like so: It uses a ...
-2
votes
1answer
203 views

PID Control Lithium-Ion Batteries [closed]

Please help in finding good literature/articles about PID Control for Li-Ion Batteries. I searched the internet but I heardly find anything. There are a lot of articles regarding motor control design, ...
-2
votes
2answers
3k views

Making a LiPo battery charger from USB +5V supply

My friend's drone battery charger is dead. I want a charger for battery, only problem is that I don't know how to do it. I tried to make one using voltage divider, but I don't know to to do all the ...
-2
votes
3answers
479 views

Approval before using built portable charger on a smartphone

I've finally managed to set up a more efficient portable charger that uses 8 AA alkaline batteries(actually not so efficient). Schematic: simulate this circuit – Schematic created using ...
-2
votes
1answer
130 views

Is a high current wall charger dangerous for my phone? [closed]

I've bought a USB wall charger to power my Raspberry Pi. I chose the 3A one so that I can connect some more power hungly devices like hard drives to the Pi's USB ports. I can connect 2 cables to the ...
-2
votes
2answers
128 views

Using a charger backwards [closed]

I was wondering if connecting a 5 volt source to a 5 volt charger is going to yield 220 volts at the plugging terminals(the charger is AC/DC,220 volts input and 5 volts output)As far as I know,every ...
-2
votes
1answer
1k views

Can I use my Android tablet charger for the PlayBook? [closed]

I got a BlackBerry PlayBook and it came with the wrong charger plug. It's for the US that I can't use here in Germany. Can I use my Android tablet charger for the PlayBook instead? The information ...
-2
votes
0answers
54 views

20-30A constant current for CC CV charger [closed]

I am working on a homemade CC-CV charger and I have facing problem in achieving 20-30A Constant current state for the CC-CV charger. I tried many circuits but I couldn't find a circuit through which I ...
-2
votes
1answer
135 views

Connecting OverCharging kit with charger [closed]

I Have one battery of 12V and 3.5 A. I purchased charger whose output is 12V and 3A. I also purchased overcharging kit. But dont know how to connect the overcharging kit with charger. You can see pics ...
-2
votes
1answer
887 views

Multi port usb charger

I want to make a multi port usb "dumb hub" kind of like this. My question though is if I have a 5v 2500mA power supply, can I just daisy chain them together with out the fuses then connect it to the ...
-3
votes
2answers
47 views

Inverting a cellphone charger [closed]

Hey guys id like to convert a charger brick to reverse the volts so invert it what. i mean is in my country its 220v so the charger brick must be able to take 5v and convert it into the said 220v now ...
-3
votes
1answer
980 views

can i use a 20V, 2.0A for my laptop that needs 19V, 4.74 A? [closed]

i have a laptop that needs 19V and 4.74A my laptop's charger broke and i replaced it with a 20V and 2.0 A the laptop seems fine but i noticed that the charging goes on and off for like an interval or ...
-3
votes
2answers
253 views

Why does my phone charger consume more electricity (watts) when delivering less amps (slower charging)? [closed]

As far as I could understand, the charging speed is measured in amps. Like, if I use Ampere, it will tell that it charges in 2.5 amps, or 1.5 amps. I hope I got this right. Amps is the only ...
-3
votes
1answer
407 views

30-0-30 ACV 8A transformer to 12DCV [closed]

Good Day.. I have a 30ACV 8A transformer. I urgently want to make a 12DCV battery charger from it. What are the components that I should use? Please also help me out with its schematic. Your help ...
-3
votes
2answers
2k views

5V and +5v charger adapter, What is the difference? [closed]

I am trying to buy a stand-alone charger for my Archos 48 500Gb Internet media player. I think it uses a charger which is Output 5V 2A, but I recently came across a ...
-3
votes
2answers
2k views

Charge leakage in wall charger [closed]

I have a wall charger for my android device that has started to leak charge on the micro usb male connector when powered on. What could be the reason for this and how can I fix it? It plugs into a 2 ...
-3
votes
1answer
111 views

Smartest way to make an 180w SMPS?

So i own this gaming laptop (MSI GX60) which draws a lot of power, the original charger i had recently broke, and i new one. But with that kind of power it costs around 60$ which is a bit much money ...
-3
votes
1answer
60 views

Iphone Lightning Charger - How would one go about it? [closed]

Hello, im completely new to EE, but im doing my best to learn. For a starter, i want to make a device that can charge an iphone with a battery pack. Ive read up a little, and i think this would work, ...
-3
votes
2answers
66 views

Speed up charging

Is there a way to create changing magnetic field that goes from positive to zero and then back to positive, regarding a sinusoidal wave. The purpose of this is to induce a coil of wire to move in ...
-3
votes
1answer
3k views

How high charging temperature causes damage to AA size NiMH cell

I used a portable thermometer and put on top of a battery charger. I notice that the temperature reach 39 degree Celsius and I can feel the warmth when I put my hand on top of the charger & the ...
-4
votes
4answers
30k views

Can a phone charger be adapted to charge a laptop battery? [closed]

I've obtained a laptop that has no charger. Short of buying another charger online, can a phone charger be adapted to charge the laptop's battery, provided it's disconnected from the laptop (i.e., the ...
-4
votes
3answers
37 views

Can i charge 18650 li ion battery by using transformerless power supply?

My question is very simple, can i charge 18650 li-ion cell by using transformer-less power supply. this transformer-less power supply convert AC current to DC current by using just capacitor, resistor ...
-4
votes
1answer
112 views

Hack smartphone IC to draw more current and allow higher voltages? [closed]

Disclaimer: This is just a laboratory experiment I am willing to do at my own risk. I understand the risk of blowing up the phone (GT-S5280) pr charger (Powstro 30W charger). I already have a water ...