Questions tagged [charger]

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

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How to convert this 220V AC input inductive charger to 127V AC input?

My friend bought a device that has wireless charging, but in my country, in the region I live, the AC voltage is 127V , and she received (a long ago) by mistake a 220V AC input version. She never got ...
Rodrigo's user avatar
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Charging of 14500 Batteries/ Low mAh reading

I am using XTAR VC4 Plus charger. Batteries (Li-ion) are brand new 1. Sofirn 14500 920 mAh & Keeppower 14500 1100 mAh with PCB & USB port. After running grading mode on this charger ( Charge, ...
AdrianH22's user avatar
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Determine proper charger specs for a lithium-ion battery [closed]

I have a device with a rechargable li-ion polymer battery but do not have a charger. Device: ZTE WF723CA ...
Chaim Geretz's user avatar
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Floating output voltage in USB chargers?

A USB charger is usually galvanically isolated from mains for safety reasons. If I touch the output connector while standing on the ground (i am at earth potential), will I get a shock? I think yes, ...
user2276094's user avatar
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Battery charging algorithm

I have designed my MPPT battery charger to a state and I have been able to generate the 14.4V charging voltage, with the 40Ah battery charged upto 14.4V during bulk charging stage and absorption mode ...
Peace's user avatar
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Can I use two of these modules to charge two lithium-ion cells that are in series?

I need a solution to charge two 3.7 V lithium-ion cells that are in series. However I have a very limited access to modules and I need to have current limitation as my source won't stand beyond 0.5 A. ...
Shamooooot's user avatar
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EV charger connector identification

I am building a portable EV charger demo for conferences, and for transportability reasons, I need the charger cable to be removable. Have you ever seen that connector?
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How to determine pinout on proprietary 3-pin charging port?

I picked up a dog collar at a yard sale that didn't come with a charger. Looks to use a 3pin charge port which takes 12v. Don't really want to buy a special charger for just 12v so was wondering how ...
dylwing23's user avatar
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Is it safe to connect 3 batteries 2 in parallel and then one in series with them?

I have three 3.7 V li-ion batteries 4 Ah each. I need total voltage to reach 8.4 V at full charge, and use the higher capacity of the one left battery. Is it safe if I connected two of them in ...
Shamooooot's user avatar
1 vote
2 answers
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Is this a safe way to increase the current in a battery charger? [closed]

I was watching this video and basically what he's doing is using the 4056 charger controller pin 7 to switch a IRF9540 that connects the positive straight through to the MOSFET. Seems this would use ...
KarlJay's user avatar
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replacing a "li-ion" HFC (3,2v) battery

I have a device with containing 4 x (allegedly) "Li-Ion" HFC batteries in serial but voltage is not 3.7 but 3.2V. labelled values "Li-Ion 3.2v HFC1450 series 500mAh 1.6Wh" Just ...
Daniel Perez's user avatar
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Gate driver selection for digitally controlled via PFM, LLC resonant half bridge charger

I am designing a LLC half bridge charger. I am going to use a microcontroller to control the switching frequency, with feedback from the output to smoothly control the switching requency. I don't ...
MSB's user avatar
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1 vote
1 answer
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Can I use a single battery charging ic to charge two batteries in parallel?

I am making a wearable device so for better space distribution I would like to use two smaller batteries instead of a big one. I've been using TinyCircuits's ASR00007 (290mA, lipo) battery which has a ...
Richárd R's user avatar
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1 answer
152 views

TP4056 USB-C charging module not working

I am having some trouble with my TP4056 USB-C module. When I first got it, I attached a Li-po battery to the battery terminals marked B+ and B- and without any load I plugged it in the socket to see ...
Solo's user avatar
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-3 votes
2 answers
238 views

Symbol for ground vs symbol for a battery [closed]

Could anyone help me to understand if this picture is correct? It is to understand the difference between the symbol of a battery terminals and the symbol of a ground terminal. I would also ...
Daniel Prieto López's user avatar
1 vote
1 answer
92 views

How does this lithium-ion battery charger work?

I opened a cheap USB single-cell lithium-ion battery charger, but can't figure what the Q1 is. It only says 'CR' on the surface. When charging, I measure about 0.7 V between its pins 1 and 2 (those on ...
lastant's user avatar
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20V Max Lithium Battery "Charge Maintainer"

I have a gadget that uses a 20V max, LiIon, DeWalt compatible battery. It's detached for charging. A DeWalt charger is used to fast charge the battery. The gadget has a POE ethernet connection. I'...
Dave Thomas's user avatar
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Wi-Fi Router Charger: is 100-240V input an acceptable replacement for a 220-240V charger? [duplicate]

My wi-fi router charger is broken and I'm looking to buy a replacement. The old one says - input 220-240V 50/60Hz 0.5A, output 12V 2.5A, efficiency level V Online, the closest I found has input 100-...
Alex Cătălin's user avatar
2 votes
1 answer
55 views

High voltage at the Schottky's anode terminal (Hobby Li-Po charger circuit)

I'm pretty new at hardware side of things and trying to teach myself circuit and PCB design just as a hobby, so. bear with me if I'm annoyingly noob for you. As a relatively simple first task, I ...
reo's user avatar
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1 vote
1 answer
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Is it possible to multiplex thermistors for multiple cell battery configurations for the BQ25756 or other JEITA charge ICs for spaced apart cells?

I'm trying to figure out how to safely implement fast charging using the BQ25756 with a most likely 2s (though up to 4s is possible) layout of physically spaced out cells. I haven't fully decided on ...
Befitting Display Name's user avatar
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Can opamp directly drive the MOSFETs?

There is a 12 V DC source. I am also generating a 10 V source from it. The output is connected to a battery. This is basically a battery charging and cutoff circuit. The charging part is working fine ...
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2 votes
1 answer
61 views

Properly Charging NiMH Batteries that Have been Stored for Too Long

For a Robotics Project, I've purchased two equal NiMH batteries, seven months ago. PRODUCT = NiMH Battery 12V 3000mAh XT30 Connector [MH-FC] 20A Fuse 12-20 LINK TO PRODUCT = LINK There is no ...
Diego Alves's user avatar
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Is this charge controller datasheet schematic an idea circuit to use?

Background - Software Engineer with an interest in EE. I'm looking to include a bq2000 battery charge controller in a circuit that I'm designing. I'm looking to use a bq2000 since it can use multiple ...
Boolean's user avatar
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Continuous load with wireless charger

I have a wireless charger module as seen in the picture and I'm trying to use it to power those tiny wireless LEDs (also on the picture) The components work properly, as the charger can charge my ...
Razero's user avatar
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What is TS component in this PCB?

I am drawing a USB type-C PD charger based on the information given by this manufacturer, but I have doubt related to the components (TS4, TS3, TS7, TS8, TS6, TS5) in the PCB board, what are those ...
imt_blake's user avatar
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1 vote
1 answer
202 views

Trying to understand IP5306 battery manager

The manufacturers datasheet of the IP5306 Battery manager IC doesn't explicitly explain how the charger works. I would like to know from which pin of the IC goes out the current to charge the battery ...
Lahcene Akrour's user avatar
2 votes
0 answers
57 views

FET Drive for 200A Battery Charger Question

I have 12V, 650A-hr house batteries I want to charge from the alternator when traveling. The alternator has a continuous rating of 240A @ 14.6V. The alternator regulator drops the voltage some. The ...
Barry Jensen's user avatar
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LT317 charger LTspice simulation acting weird

I am currently trying to design the constant-voltage charging block for a Li-ion charger as a part of a course project. The charger block has an LT317 regulating the charging voltage to ~16.8V and an ...
user294957's user avatar
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Should I include a current limiting and reverse current flow protection circuit in a battery charger circuit? [closed]

I am designing a lead acid battery charger and would like to know the following. Should I include a current limiting and reverse current flow protection (As shown in the image) circuit to keep the ...
Nithin's user avatar
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NiMH battery charger of hair trimmer

Can you please help me to understand the working principle of this circuit. It's a simple circuit for charging the NiMH 1.2 V battery and driving the DC motor of a hair trimmer. I'm confused because ...
عبدالله مناع's user avatar
0 votes
2 answers
166 views

Universal laptop charger on USB-C computer

I recently bought a new laptop that came with a USB-C charger, leaving me with a few universal chargers from my old laptop that do not have a USB-C tip, but have the power capacity to supply the 20V/...
Lowraxe's user avatar
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2 answers
103 views

Why do phone companies ask to use their own chargers? [closed]

A mobile charger is basically a switch mode power supply. Samsung asks its phone buyers to use only Samsung chargers, but the general noise on the internet is that even a NOKIA charger works fine on ...
John Snow's user avatar
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7 votes
3 answers
739 views

What technical progress enabled high-efficiency charge pumps?

I found a lot of information on the internet, most of which told me that charge pumps are only suitable for low-power scenarios and they are not very efficient. Charging ICs based on the charge pump ...
Bruce's user avatar
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1 answer
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Can I power my MacBook Pro 2023 with MacBook Air 30W adapter? [closed]

Can I power my MacBook Pro 2023 with MacBook Air 30W adapter? Any potential for damage? I believe the answer is no, but seeking some second opinions.
be-ee's user avatar
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2 votes
0 answers
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2 xLM324N lead battery charger fail. Images added

i have a Lead Acid battery charger that was given to me since its not working. I have no 12volts output neither any led on. Schematics do not appear after hours of google search So far ive tested ...
Cabe72000's user avatar
-1 votes
2 answers
224 views

LiFePO4 battery charger and inverter in parallel

I've got a brand new LiFePO4 battery (200 Ah) with internal BMS, got the Blue Smart IP65 Charger from Victron Energy and an inverter. The easiest way to connect them is in parallel (off course adding ...
user348431's user avatar
1 vote
2 answers
367 views

Laptop connectors and universal chargers (tips M3, M4, etc.)

I am interested in having more information about connectors and identifiers (M3,M4,...M31) used by laptop universal chargers. Is there any "official" list or convention for laptop ...
Daniel Perez's user avatar
1 vote
0 answers
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The voltage VBAT on the HP4059 IC

I am using the HP4059 charger to charge a 35 mAh battery. Here is my schematic: I have placed a 3 kΩ resistor R1 (charging current of 33.3 mA). If there is no load on VBAT, everything works fine, and ...
Максим Захаров's user avatar
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0 answers
161 views

TP4056 power cutoff circuit using PFET

I want to understand this and also to make sure this will work. This is a TP4056 USB-C charging circuit. The circuit is almost the same as the regular one you'll find ordering from China. The only ...
Domenico's user avatar
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0 answers
162 views

Can I charge my PA with a Makita 18v battery and an adapter?

I have an 18v 3A power brick that is used to charge a portable PA system with an internal battery (internal battery is 14.8v 2600mA - ie 4x18650 Li batteries). The PA system probably has the ...
Shahzad Ahmed's user avatar
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1 answer
55 views

15 W USB ports in car [closed]

My car has two 15 W USB C ports that will fast charge my phone, but they are not powerful enough to super fast 2.0 power my phone (S21+). Is there any kind of device that would take the two 15 W ...
Andrew Taub's user avatar
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1 answer
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Amount of watts on a phone charger [closed]

I'm building a phone charger, and I'm curious about the output power. We know that a phone battery charge on 5 V, and let's say the overall resistance of the charging circuit in the phone is about 200 ...
Ahmed Ali's user avatar
1 vote
0 answers
28 views

How wireless charger automatic detect Rx Coil to turn on

I want to know how wireless charger can detect 2nd coil then the switching at 1st coil is on, but when the 2nd coil isn't detected by 1st coil, the switching at 1st coil is turn off. How it happens? ...
Kresna Wahyu's user avatar
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1 answer
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Can’t read code on blown capacitor

I have a blown capacitor with damaged code (maybe 102?45)it’s from a charging circuit board from an 8zed-2000S-12v-UPS inverter/charger/UPS.240v-15amp charger the markings on the board are NTC1. I can’...
Ross Widger's user avatar
1 vote
2 answers
479 views

Charge my DIY 18650 battery pack with DW01A BMS board

I am currently in the process of making a 3S 18650 battery pack using a BMS board that I purchased from Amazon. The image of the board can be found below: Yesterday, I successfully connected all the ...
Defisher's user avatar
1 vote
1 answer
54 views

Advice for my Battery Management/Charging System

I am working on a battery management or charging system for a 3s2p battery topology. It will be used in a project where AC power from an alternator is rectified to DC power and is used to power ...
C Kim's user avatar
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0 votes
2 answers
163 views

How does this half bridge inverter charger charge the battery?

I just can't understand how this inverter charger actually charges the battery. The charging circuit uses two SCRs on the mains side of the transformer. The same transformer is also used to step up ...
Abhishek's user avatar
1 vote
1 answer
34 views

How do I connect an intermittent load (RC airplane electronics, servos, motor) to solar cells and a battery?

I'm a bit of an electronics noob and haven't been able to find a straight answer to this question despite doing quite a bit of research, so I figured I'd ask it here. I am working on an autonomous RC-...
jdsp522's user avatar
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0 votes
0 answers
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IP5301 USB Negotiating?

Currently trying to get this board to simply supply me 5v through the USB terminals on the back. https://a.co/d/3mZtA3k I have the USB + and - hooked to a Wemos D1 Mini V4, and when I activate the KEY ...
Yotta's user avatar
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1 vote
1 answer
375 views

Which way should I solder these XLR terminals?

I need to install a female XLR connector on my electric bike to work with a new charger which has an XLR plug. Before soldering the wires, I wanted to check that I'm making the connection in the ...
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