Questions tagged [powerbanks]
The powerbanks tag has no usage guidance.
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Battery Bank Replacement [closed]
I have an old power bank with swollen battery with the specs you can see in image 1
This is the module, but I can't find any specs nor schematics on the internet.
The image below will show the full ...
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Controlling power bank via USB
I've got only a basing electronic background and I'm more experienced in programming :)
I'm going to use some power bank (PB) device with USB connectors to provide power to my embedded system. I ...
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How do I run two NEMA 17 stepper motor from a 5v 3a powerbank?
The motors are 2 phased 4 wires 3.3v @ 1.5a, and I need them to run from a powerbank, how do I control and provide the motors with power? Which drivers are needed? They will be controlled by a ...
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18650 parallel power bank cooks the furthest batteries
Against my better judgement I bought one of these 18650 power banks (see image). The reviews didn't disclose any issues and this sort of tech is so common now I never really thought much of it.
It ...
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Can you measure a powerbank's battery voltage at USB input connector?
I'm currently building a portable device, that is powered by a powerbank. I want to be able to measure the current battery "percentage" of the powerbank, with an esp32.
For this i thought ...
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USB-PD DRP from a single LiFePO4 cell
I am about starting a project with LiFePO4 pouch cells. The idea is to create a powerbank from a single cell. The powerbank must have an input/output USB C connector with 65W minimum power (100W ...
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What indicators can I use to decide whether a power bank which I am interested in buying will appropriately regulate current and voltage?
Anker, one of the largest manufacturers of power banks, often indicates in its ads that the product in question uses a specific system, MultiProtect, to avoid stressing the phone battery which is ...
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Understanding power bank discharge circuit
I am trying to understand the charging and discharging procedure of a lithium ion cell.
Eventually I would like to be able to build my own power bank, I understand that there are existing power bank ...
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How to use a USB powerbank for my electronics project when it starts with 2 or 3 V?
It seems appealing to power my small electronics projects with a 5 V USB power bank, however, it starts with 2 or 3 V, not 5. How come, and how to get a reliable 5 V output?
I tested with 2 digital ...
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Can I use a power bank of 5 V/3 A to power an Orange Pi 5?
I'm trying to build a portable PC with the Orange Pi 5 16GB RAM model with a touch screen and powered by a solar power bank.
I saw that the Orange Pi 5 requires 5 V/4 A to be powered, but I can't find ...
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Charging laptop with the DIY powerbank
I want to charge my laptop with DIY power-bank which has variable voltage output.
Laptop peak consumption is 65 W and the power-bank has plenty of power to deliver it as it was previously used as ...
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USB-PD DRP controller with Custom UPS board
I am trying to accomplish, combining a USB 3.2 Type-A port with a USB Type-C jack, which supports USB-PD DRP (Dual-Role-Power), like in a laptop, as described in this post. The part of USB-PD with USB ...
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Can I use a power bank to power my laptop during a blackout? [closed]
I am wondering if it's possible to use my ThinkPad L430 laptop with a power bank as a power source during a blackout. The laptop's power consumption is between ~35 to ~42 watts. Its battery is always ...
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Relay to toggle 2 power sources
I wanted to use some MOSFETs for my power bank/almost UPS but I will do it first with a relay to keep things simple.
Is my relay connected correctly in this (uncompleted) diagram? I guess I can split ...
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How many times a power bank can charge a smartphone?
I am creating a power bank with 3000mAh 18650 cells in a 3S5P configuration. This will give me 189Wh, 12.6v, and 15A. Assuming an iPhone 8 has a battery of 1821mAh or 6.96Wh, how many times it can be ...
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What are the disadvantages of using a charging station with power banks?
I want to have good power system for my van. I liked Jackery Explorer 240 . Price is good: $219.99. But the problem is that its capacity is only 16.8Ah and only 2 USB ports.
I can buy a more expensive ...
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Why are integrated USB PD PSUs with powerbank not more common?
Looking into the circuits and logic behind USB PD (in particular USB-C PD), I wonder why it is not more often done to combine a wall-plug PSU and a power-bank (battery powered PSU) into one. Would ...
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Simulate powerbank's disconnected state
There is a powerbank which has (among others) an USB-A port.
The powerbank can be turned on with two methods:
Pushing its button
Connecting a load to either of its ports
In any case, the bank will ...
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Why does using a pure sine wave inverter help reduce audible and electrical noise in some electrical appliances?
I read on some power bank description:
Stable AC Output: The built-in AC wall outlet uses a pure sine wave inverter to reduce audible and electrical noise in fans, lights, and other sensitive ...
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A proper way to stop power banks from turning off, and how to power low-current devices through USB
I have a device with a microcontroller that is powered via a USB-C connector. It is a more or less a standalone device (a synth with a USB-C power input and a jack output) and probably user would want ...
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Multiple power banks to handle temporary increase in power demand
I have 1 PoE+ (Power over Ethernet) port from which I need to power 5 Raspberry Pi 4s.
The recommended power supply for Raspberry Pi 4 is 5.1 V / 3 A which gives 15.3 so 5 Pis will require up to 76.5 ...
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Can I charge a laptop with a solar panel? [closed]
I have bought a 30W solar panel, with output:
USB 2.0 : 5V/2.4A
USB3.0 (QC3.0): 5V/2.4A, 9V/2A, 12V/1.5A
DC: 18V/1.66A (Max)
I would like to charge my laptops. I have seen this power bank of 90 W, ...
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DIY power bank with NiMH batteries
I want to do a DIY power bank with NiMH batteries, like this example... But I have 6 NiMH batteries with 2600 mAh and 1.2 V.
I want to use a 18650 PCB LCD but they are designed for Li-ion 18650 ...
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Can I charge my laptop with powerbank? [closed]
I have a Lenovo laptop with a L16L2PB3 lithium-ion battery. It has 4610mAh capacity which is enough for 3-4 hours of power. I want to have an ability to charge it when no sockets are around and for ...
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I'd like to know if I can take a couple of powerbanks and connect them into one power bank
I'm kind of new in the electric things and I'm also a teenager so I don't have that much knowledge. I learned about Arduinos and very basic stuff so I would like to do this as kind of a project to ...
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What can be possible reason for explosion and fire in battery pack built with 3S Li-Ios BMS
I recently made some 12v battery back using regular 3S Li-Ion BMS and 18650 cells.
Unfortunately, 3 of them EXPLODED and one even caught fire on site.
The BMS I used was almost exactly like this but ...
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BMS 4S 40A Li-Ion balancer board problem
Trying to figure out how to use the BMS 4S 40A Li-Ion protecting balancer board that I got off Ebay. Revision 2.3, photo and schematic is attached. I am building a power bank. Got some new NCR18650b's....
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Can I connect batteries of different capacity in parallel?
I don't think this has been covered in other posts.
I have a 3.7V 6000mAh li battery pack and three 3.7V 2000mAh li battery packs. If I wire the three 2000s in parallel to make a 6000mAh cell, then ...
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Power bank's output current
I'm wondering what factor determines the maximum output current of a power bank. Is it limited by the internal battery's current or the output current of the voltage regulator? Also I'm not sure that ...
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Can a super capacitor in parallel make a power bank usable as UPS?
I want to use a power bank as UPS for my Raspberry Pi but it doesn't has pass-through power, so whenever mains power gets connected or disconnected, the power bank cuts off power supply to the Pi for ...
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Problem Understanding circuit of 5-volt battery charger IC
The attached image is from the datasheet of IP5306 Fully-Integrated Power Bank System. What is the significance of adding 2 ohms (R3) and 0.5 ohms (R4) resistance in the circuit? It is expected to ...
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If I had 2xUSBA @2.4A/ea. but only 4A max output from 21W solar panel, would joining the usb cable leads together give me one safe a 5v/4A output?
Mission-Solar fast charge? If I had a 21W solar panel with 2 USBA/2.4A or 4A max outs, could I simply strip and match leads to form one USBC input to a USBC input on a Poweradd PD 30W Power bank and ...
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Problem with using power bank for modem with dc dc booster
I want to run a modem that needs 12 volts with a power bank.
I've used a DC-DC booster to increase the voltage of my power bank which is 5 volts up to 12 volts and there is no problem with that.
After ...
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How do power banks like the OmniCharge, convert 3.7V to 120VAC? [closed]
I've noticed the cells are all put in parallel in these devices and it lead me to asking myself what kind of inverter could they be using? Like isn't it a bit inefficient to convert from such a low ...
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Why USB power banks tend to have much larger capacity than cordless tool batteries? [closed]
I have a 10000mAh battery pack for charging phones/tablet/whatever but I also have some cordless tool batteries which can be used in an inverter to power a usb charger similar to the power bank. The ...
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5V Powerbank not turning on automatically when > 100mA are drawn
In this project, I power cycle a RaspberryPi Zero over a 5V USB powerbank, please have a look at my previous question:
Blocking current from Backup battery (3x1.5V=4.5V) when powerbank (5V) is turned ...
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Blocking current from Backup battery (3x1.5V=4.5V) when powerbank (5V) is turned on my timer switch [duplicate]
I'd like to power cycle a RaspberryPi0 each 1h. I plan to use a TPl5110 for this, which can be powered by around 2.5-5.5V. I want to deliver 5V to the Vdd-Pin using a powerbank. However, once the RPI0 ...
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How can I power an LCD controller board with a power bank?
I am new to electronics so need help.
I salvaged the screen of a broken VivoBook E402NA laptop and bought this controller to turn it into an external monitor.
Evidently, this controller needs 12V DC ...
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How I can connect my device with input 15-20V to my power bank [closed]
I have a power bank from baseus 65w, which can be output 20V ~3.25A. That brick successfully charge my laptop with 20V via USB-C. I want to connect my another device which input: 15-20V 1A and have DC ...
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12V from Mi power bank 3
I have an Mi 18W 10000mAh powerbank 3 which I want to use for my project. I need 12 volt output. Although this powerbank supports 12V output, this feature is probably proprietary. A PD decoy module ...
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Taking more than 2.1A from a two-port "2X 5V / 2.1 A" USB powerbank? [duplicate]
I just bought a powerbank for intending of using it to power a Rasberry Pi4b
But, it seems i did not do enough research regarding the requirements of the Pi model i have.
The powerbank is listed as &...
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Why does my power bank switch off when I use it to charge a toy battery
I want to use a power bank to charge the battery of a toy car.
I used an old USB cable, connected the power lines only to a voltage step up circuit to step up the voltage from 5V to 8V, then connected ...
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XL6009 boost converter as 8V camera (DSLR) external power supply - camera not turning on
I need my camera (Canon EOS 7D Mark II) powered in terrain for a long period of time (10 + hours, mostly idling.)
I bought a dummy battery with a 5V to 8V boost converter (camera uses a 7.2 Li-ion ...
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What is the effect of using wrong DC adapter to power on an electrical device?
Electrical devices powered by a DC adapter have specific in/out voltage/current values, so as an example what will happen if we used an adapter with 9v/1A output for a 5V/0.5A device?
Consider all ...
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If a power bank accepts multi voltage input, will the lowest accepted voltage choice cause bad effects on the battery?
I have a power bank which accepts 12V-24V as input for charging the battery. (It aslo supports 12V-24V outputs. But this is not related to the question.)
Assume that I will charge the power bank only ...
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Two same capacity/model powerbank. Output connected via Y connector (parallel) [duplicate]
If I have 2 same capacity/model of power bank and combine the output via Y connector (parallel), will there be any issue?
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DIY Power Bank For Router & Fiber ONU
I'm trying to build uninterrupted power bank for my 9V 1A router and 12V 0.9A ONU. I have made a circuit Mindmap. But I think I have done some questionable things in it. Such as, I don't know the ...
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Powerbank instead of Alkaline D batteries
I am an avid fan of charcoal bbq and love fire starters/blowers like these.
They require type D 1.5 V alkaline batteries which are increasingly harder to get and usually run out in the most ...
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Boost Voltage from 5V to 19.1 V
Long story short, I have a Toshiba laptop. Its adapter outputs 19.05 volt and 3A.
I wanted to build a powerbank for my laptop. I have built one using Li-ion cells. 5 cells in series with each cell as ...
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Small powerbank, li-ion cell charging voltage problem
While ordering a replacement for an 18650 cell from a small powerbank, I've overlooked an important property of the battery. The old, broken one had 4.35 charging voltage and this is what the internal ...
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