Tag Archives: powerbank

Review of a 50000mha solar USB Powerbank | testing a solar panel usb powerbank

I have developed an unnatural obsession with powerbanks, I have a large number of them for different purposes.

I decided to start reviewing them to give people information before making a purchase, often these cheap devices are sold with a number of features which may or may not be useful of even work at all.

So ill start off by listing the locations where you can purchase them, and the costs.

So for this experiment ran two tests, one with the unit on its own and another with an external USB Solar panel attached to assist in the charging.

Here are the links and costs to the products.

  • Powerbank 50000mha dual usb with LED – $24.99
  • Solar Panel 6volt 3.5watt – $7.38

01. The first test was conducted in the following way. I put the powerbank in the sun during an overcast day for six hours facing North (10am-4pm). Then I connected it to my phone can checked to see how much charge was given.

Results: 12%

Conclusion. The charge isn’t that much, but its enough to get you out of a sticky situation.

02. The second test was conducted in the same way as test one, but also installing the Solar panel listed above.

Result: 40%

Conclusion: I’m impressed, 40% is decent charge levels for 6hours in the sun.

Overall Conclusion:

Im pleased with this product. I have tested it in the rain, I can confirm its was resistant. Its a tough product, it needs to be if its going to survive in my world.

Powerbank endurance test for Raspberry Pi 3. | testing how long a raspberry pi can be powered via a powerpank

Iv like to test and know how much uptime can be achieved by different powerbank.

I purchased this powerbank case on ebay and then purchased the 18650 3.7v batteries separately.

I have built two powerbank with identical cases but different batteries. 

  • Powerbank – $5.35
  • Batteries 18650 9600mha – $24.80
  • Batteries 18650 6000mha – $22.49

The results?

  • Batteries 18650 9600mha – 23 Hours
  • Batteries 18650 6000mha – 18 Hours

It should also be noted that the Raspberry Pi is online via wifi during the whole test while getting pinged every minute.

Building a Apple Macbook Powerbank | apple macbook powerbank charger

Iv been looking for a powerbank for my Macbook Pro for years. I managed to find one years ago at the price of $300, too much.

I recently purchased a powerbank from ebay and noticed it has a 15 volt option, considering the Macbook chargers are 16.5 volts it should have enough grunt to charge it.

The only component I ordered was the custom Apple cable. Here is the shopping list.

Ok, lets get started with the project. This project can be completed by a beginner, its not complex at all. You just need to ensure its completed correctly as it may cause damage to your Macbook is connected incorrectly.

So i found a Coaxial power cable in my garage, this is the cable connected to the powerbank. We need to fuse this cable with the custom Apple charge cable.

Once we connect the two, we must ensure we seal them correctly using some shrink seal.

I finished and connected it to my Macbook Air 11″, worked straight away. You must ensure that positive and negative is connected correctly. This is achieved by using a multimetre.

When you have completed the project before connecting to your laptop, using a multimeter compare the created cable with the power adapter. You should achieve readings like this.

If your happy with the results then you can connect it to your laptop, you should see the green light which will then turn to orange indicating that its charging.

Results?

Im really happy with it. I did a test of it charging capabilities. I charged the powerbank 100% and then connected it to my Macbook Air which had 15% charge. It charged it to 48%. Its probably around an extra hour of operation on the Air. Enjoy!

Raspberry Pi – Experiment 1 | raspberry pi b powerbank wifi usb dongle power test how long it will last

raspberry_piIm currently working on a personal project to have a raspberry pi operating remotely without mains power on a 24/7 basis.

This has raised a lot of questions about whats required to achieve this task, mainly around solar panels and batteries.

wp-1473652945655.jpgI have found a couple articles around raspberry pi power consumption vs raspberry model. I found working with the theoretical max’s always leads to disappointment.

So this is the first of a series of experiments which will step by step lead us to the figures we need to achieve our objective.

In this first experiment we are connecting a Raspberry Pi B with a USB Wifi dongle purchased on eBay. We are finally using a USB power bank (30,000mha).wp-1473652836299.jpg

I have connected these devices together and written a script on my desktop which will poll the raspberry pi on the network and log the results. I will attached the command used to achieve this, just in case you want to conduct come tests yourself.

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After charging the power bank fully, running the raspberry pi lasted for 11hours and 51minutes. So  short of the required 24 hours. Ill be testing different power banks to get an understanding about quality.