Questions tagged [powerbanks]

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79 views

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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47 views

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 5V to 8V boost converter (camera uses 7.2 Li-ion battery), ...
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1answer
61 views

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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1answer
59 views

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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0answers
17 views

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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1answer
58 views

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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0answers
43 views

Power delivery broken?

I am tinkering with a ZYPDS power delivery board to develop, in combination with a XL4015 step-down module (https://www.ebay.com/itm/5Pcs-5A-XL4015-DC-Step-Down-Power-Supply-Lithium-Charging-Module-...
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1answer
29 views

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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2answers
62 views

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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0answers
41 views

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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1answer
88 views

Can I draw more current from this battery?

I'm looking to build a power box like this one: The battery that I'll use is 12V 35Ah deep cycle battery, which has an initial current of <= 10.5A: Devices that I plan to connect are: On 12V ...
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56 views

Mini PC stick can be powered with mains power adapter (5 V/2 A) but not with power bank (also 5 V/2 A)?

I bought this product with the hopes of powering it with a power bank: https://www.intel.ca/content/www/ca/en/products/boards-kits/compute-stick/stk1a32sc.html https://www.amazon.ca/gp/product/...
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0answers
19 views

Does USB-PD prevent power banks not to fall asleep?

I'm playing around with PD board (SparkFun's DEV-15801, programmed for 9V) and power bank (Anker PowerCore 10000 PD) and observe the following behavior: When I connect PD board to USB-A port of the ...
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2answers
59 views

Building a powerbank into a record player

My "portable" record player has a 5VDC 2A input via a barrel power jack and I want to use a normal powerbank to make it truely portable. Can I just solder the 5V output of my powerbank to the 5V ...
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1answer
32 views

How many routers can the Powerbank power and how long?

I have a power bank, Capacity: 27000mAh/99.9WH Input: 19V/1.6A AC output: 220V/50Hz 100w Max Router (MR600) Input: 100-240v 50/60hz 0.6A output 12v 1.5A
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3answers
259 views

How to boost a Power Bank's maximum output voltage? [closed]

I have an Anker ~27Ah Power Bank which has 3 × (5v , 3A) power output. Is it possible to connect the outputs in series and get 10v or 15v output with a current flow of 3A?
1
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1answer
45 views

Replace 173 Wh lead acid battery with 20000 mAh power bank

I have an APC BX1100C 173 Wh UPS that I use for my computer. I also have a 20000 mAh power bank with output voltage of 5 V. What do I need to do to replace UPS battery with this power bank? Is this ...
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0answers
39 views

Diagnosing USB Power bank shut-off on load application

I'm trying to create a small bluetooth boombox-style speaker, but am having trouble powering the device from a USB battery bank. Fundamental Problem: The power bank "shuts off" as soon as the load is ...
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4answers
74 views

How to know how much energy storage has powerbank? [closed]

I just looked to this question and I don't understand how to know how much Wh this powerbank has (click "Specifications" tab), because it has different output voltages and I don't know how to ...
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0answers
72 views

Design power bank with BQ24195

I want to design a power bank control board for a single-cell lipo battery. The IC I have selected is BQ24195 by Texas Instruments - datasheet here. I think it is perfect for what I need. It comes ...
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1answer
196 views

Will my DIY powerbank be safe? It will be charged using laptop chargers

I want to build a DIY power bank that can be powered using most types of laptop chargers. I do not have any background except personal interest and lots of videos and documents read online. I need ...
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1answer
35 views

Help needed configuring battery bank out of smaller cells

Due to availability and not practicality, I am attempting to build an as large as possible battery bank from 16 AH AGM batteries. The end goal is a large system that is charged with a solar system ...
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0answers
32 views

unable to charge the powerbank in this setup

The main objective is to make a perpetual powersupply (uninterrupted power supply) for a raspberry device. However, in the schematic below I have replaced the pi with a simple LED resistor since I was ...
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1answer
93 views

What would be the difference between the output of a power bank and a laptop usb port? [closed]

I have an encoder which I have been successfully using when powered from my a USB2.0 outlet on my laptop. I need to be able to run it whilst disconnected from the laptop and so tried powering it from ...
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1answer
416 views

is it possible to get 20 volt 2a from 2 powerbank which have 5v ,2a 4x output?

is it possible to get 20 volt , 2 a from 2 power bank by connecting 4 usb port (each 5 v ,2.0a) . if can what should i use to prevent damage , short circuit , and catastrophic . i making a device ...
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1answer
85 views

How to unite three different batteries in to one powerbank [closed]

I'm absolute beginner in electrical engineering and I need help in building a powerbank using three different batteries with different characteristics. I have a sudden passion to implement this ...
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2answers
124 views

Two 5V2A powerbanks draw different current under same conditions?

I have 2 different powerbanks, both have 10000 mAh and both are rated for 5V 2A power input. I have noticed that they draw a different amount of current despite using the exact same charger (5V 3A), ...