I was getting ready for a long train ride from KY to DC and found out there aren’t any AC outlets for coach seats! A 15hr ride isn’t too bad when you have a smart-phone; then again, the stock battery on an HTC Incredible will last only about 3hrs of heavy usage. Not good. I wanted a way to be able to use it for, well, 15hrs. So, using some easy-to-find parts I made an extended battery that will charge the phone via USB. I also wanted the extended battery to be rechargeable. So, I need to be able to have access to the battery contacts; maybe later I will add something fancier, but for now the battery disconnects from the USB circuitry. Here’s my finished product, and how to make it.
I bought a battery from the local Home Depot for $20 (look in the outdoor lighting aisle). It is 6V and provides 6.5AH. You can get it cheaper at places like batterymart.com, but I was in a hurry and the shipping on seal-lead acid batteries is not cheap. The higher the amp-hours (6.5AH in this case), the longer you will be able to run your USB device.
Now for the voltage – USB uses 5V DC. I needed to drop the voltage from 6V to 5V, preferably without too much loss. There are three main options: voltage divider using resistors, non-switching regulator, and a switching regulator. In the case of the voltage divider, the resistors basically turn the extra voltage into heat, and they would need to be rated for higher power than the typical $0.01 resistors. Switching regulators, or DC-to-DC converters, are much higher efficiency, but are more costly. Also, I couldn’t find one that would work at Radio Shack, so I went with a non-switching regulator: the 7805.
The 7805 regulator will take voltages higher than 5V and hold them at 5V, also allowing up to 1A of current. While that’s much more than is needed, it gives a nice buffer. A regulator has three legs: 1) input, 2) ground, and 3) output, where the ground leg is shared between the input and output. The input comes from the positive side of the battery, the output goes to the 5V pin on a USB connector, and the negative side of the battery along with the GND pin on a USB connector both connect to the ground. Since the 7805 drops the difference in voltage by heat, adding a heatsink to the regulator might be needed, depending on how much power your device will draw.
To connect USB devices, I need an adapter that would allow me to plug in a standard USB cable, like the one in your computer. I happened to have an old PS2/USB adapter from an old mouse. It hasn’t been used, ever, so I cut it up (the green thing above). You could use something else, like a USB extension cable which already has wires to solder to. USB connectors have 4 pins: 1) 5V, 2) Data+, 3) Data-, and 4) GND. Use some wire to solder the connections (USB 5V -> 7805 Output), (USB GND and Battery negative -> 7805 Ground), and (Battery positive -> 7805 Input). Make sure to protect the solder points with some heatshrink or risk shorting, melting, and other bad things. To connect the wires to the battery terminals, I used spade connectors. Also, leave the terminals pointing up for reasons I’ll point out soon.
Once the soldering is done, connect the battery and use a multimeter to check the output on the USB connector (voltage across pin 1 and pin 4 should be +5VDC). Then you can freely connect a USB device and you’re set. You could stop here and be done. Since I wanted this for travel and didn’t want exposed wires, I took it a step further: enter hot glue.
Clean the top of the battery and add a layer of lubricant (e.g. WD-40) to keep the glue from sticking to the battery. We want the circuitry to be detachable so that we can recharge the 6V battery using a trickle charger/car charger. This is why I left the battery terminals sticking up – so that I can freely pull the circuit away from the battery. I used about 10 – 15 sticks of hot glue used on a mini gun, just to make sure that everything would hold together. This is the most time-consuming part. It doesn’t take a lot of thought to do this. Just fill in all the holes, keeping the USB port accessible. You also want to keep the heatsink partially uncovered so that it passing air can pull away the heat given off by the 7805 regulator. You could spend a lot of time getting this pretty by squaring up the sides and making it colored, but this was a last minute project for me. Hopefully you will get some good use out of this – I know I will. I hope they don’t kick me off the train thinking it’s a bomb.
September 2, 2019 at 6:16 am
Students Assignment Help offers online help to management student to complete there assignment. our assignment writers have MBA degrees from top universities, they have knowledge about Marketing management, Financial, Information systems, Human resource, Operations and logistics, and other management courses.
January 31, 2020 at 3:08 pm
It was great invention but now a days it is very common and everyone using this battery-powered usb phone charger and now a days it is known as the power bank but it work good.
September 4, 2019 at 3:28 am
Get your coursework written myassingmenthelp.com . we provide coursework by our 8 years+ expericnce experts who have well knowledge how to write you course. Now do my coursework can be done by myassignmenthelp.com
September 5, 2019 at 4:18 am
glad to be here i found it so amazing
September 5, 2019 at 7:32 am
We are offering assignment help , Resume making, Essay writing, Dissertation writing, SOP and many more. Just visit on our website and get the assignment help for all the subjects. We deliver our services in more than 50+ countries like Australia, India, Pakistan, Hong Kong, South Africa and many more.
September 6, 2019 at 6:06 am
Want to buy Organizational Culture Assignment For your assignment help . Hire the best assignment writer. We Assignment writer provide the best content for the Organizational Culture assignment help.
September 10, 2019 at 4:46 am
We provide Assignment Help support service. Expert writers of US assignment who will help you by providing high-quality essay help and other assignment assistance services.
September 11, 2019 at 11:37 pm
Are you looking for the best quality F 100 Classic ford truck parts online? Carolina Classics is the manufacturer of best F-100 Ford Truck Parts | Buy F 100 classic Ford truck parts online at Carolina Classics.
September 12, 2019 at 5:46 am
This is amazing to charge, plug the supplied cable into the input port on the battery pack. Attach the other end, usually a standard USB, into a wall charger or other power source. Battery pack input ranges from 1Amp up to 2.4Amps. Put simply, the bigger the input number, the faster it will recharge. Cheers!
September 12, 2019 at 5:50 am
This is amazing Idea to charge, plug the supplied cable into the input port on the battery pack. I’ll try to make this charger battery. Keep posting such as things. I’ll wait for the new post. Thank you so much.
Cheers!
September 12, 2019 at 5:51 am
Thank you so much for this amazing Idea. I’ll try to make this charger battery. Keep posting such as things. I’ll wait for the new post.
Cheers!
September 12, 2019 at 1:08 pm
Downloading, installing and activating Norton setup with activation key, visit norton.com/setup.
September 16, 2019 at 6:33 am
India is a land brimming with dishonest government officials who consider only juggling increasingly more cash by degenerate ways. They work for their own benefit as opposed to the benefit of their nation. This is the reason, Nikhil Nanda weights on having youth leaders for the advancement of our nation.
September 16, 2019 at 2:36 pm
It is better to have voltage regulator changes like the TL497. You can also decide to do it after less than 5V by charging the battery at a power differential.
September 17, 2019 at 5:19 am
Thanks for Sharing
September 17, 2019 at 5:48 am
AllAssignmentHelp.com/au/ is here to make a student’s life easier by giving them online assignment help services at manageable prices.
September 19, 2019 at 6:01 am
We will be helping you with for Online Assignment Help. All students visit today our website and find the best help for themselves. As we make sure that your doubts and queries must be resolved because that’s our motive as we want our students to go smoothly and tension free.
September 20, 2019 at 4:04 am
These type of articles keeps the users interest in the website. I found this one pretty fascinating and it should go into my collection. I am Impressed.
September 20, 2019 at 4:05 am
The author of this post is very talented, I greatly admire you, hope you will succeed in the next post. I would love to keep track of your posts, It is really a useful source of information, wish you success.
September 21, 2019 at 1:23 am
Need Online Assignment Help Australia? Goto Assignment Help offers all these courses:- Assignment Help Australia, Online Assignment Help, Australian Assignment Help, Help with Assignment, Assignment Helper with 25% OFF
September 23, 2019 at 12:52 am
Hey that’s a really cool technology, by the way if anyone is looking for a payment gateway services, visit my profile.
September 24, 2019 at 12:44 am
I really happy found this website eventually. Really informative and inoperative, Thanks for the post and effort! Please keep sharing more such a blog.
September 25, 2019 at 6:00 am
Thanks for sharing such an informative article.
September 26, 2019 at 4:55 am
I was looking to buy this charger from the internet and got this post which is related to Battery-powered USB Phone Charger. I am enjoying while reading this post and I will must share this information with others.
September 27, 2019 at 3:13 am
Great post! I am actually getting ready to across this information which I found very interesting to read. I am working as an academic consultant in Australia and offer excellent my assignment help services to college students.
September 27, 2019 at 6:03 am
If u looking for dissertation Conclusion is the most important part of dissertation. A good dissertation conclusion gives out the perfect point of information.
September 30, 2019 at 3:29 am
Students, need Computer Science assignment help,should enjoy the service of our 5000+ and 8 years of writing Experience with best price guarantee. Urgent order your assignment with running offers you will Get. Order Now.
October 1, 2019 at 1:56 am
Hey, I would like to purchase this USB phone charger because I am student at the university of London and I can easily use this charger into my FYP project which is based on face recognition and so on :P
October 3, 2019 at 2:40 am
The Most Effective Vape Juice Wholesale Distributors in the UNITED STATES
snowwolf vape
With many individuals opting to vape, there are many vaping industries. They have a collection of various vape juices marketed in wholesale. This way, you can delight in vaping the yummy flavors. The companies are online hence you have to spend for some delivery costs. They provide in good time without any hold-ups experienced. Some are shipped the day you make the order. For other companies, you have to wait till the next day.
best vape tanks
The vaping business is competitive thus the suppliers strive to thrill their clients. Their solutions ought to be excellent to bring in clients as well as maintain them. The e-liquids should be of premium quality as well as authentic. Without the two attributes, they can not offer. The following are the vape juice wholesale representatives that you can rely on with their items.
suorin
What wholesale methods
Wholesale is when you get items in large quantities at a lower rate. The price is budget-friendly because you are acquiring more than one product. You get to conserve loan while you have products that will certainly last you for a while. It is the best deal for e-liquids due to the several types that you can obtain wholesale.
suorin vape
Aspects that need to be taken into consideration when searching for vape juice wholesale representatives
In the United States there are several e-liquid wholesale representatives. You might obtain puzzled regarding which is the ideal one. To obtain the most effective deal, you can watch out for the adhering to facets.
– Minimum orders
At the back of your mind, you need the item in quantities. Hence, you ought to ask the minimal number to order. You can for that reason obtain worth for cash. Buying them in plenty will certainly mean that you get to pay much less.
– Flexible Prices
The cost each should be versatile. It should reflect on the number of products that you are purchasing. The cost for less products ought to be various. You shouldn’t buy at the exact same expense as those wholesale. For example, if you plan to buy 200 vape juices the device cost can be $1. Yet if you purchase 400 items, the price per unit need to be $0.50 to match the cash worth.
– Delivering Cost
Various firms will certainly bill a cost for the items to get to you. This depends mostly on the location. The costs will, as a result, vary with the company. Fortunately is that there are business that offer totally free delivery when you acquire items worth a good quantity.
Five Superb firms to obtain wholesale vape juice
Vape juice distributors ought to offer you only the most effective. This ranges from valuing to the orders that you require. The companies below will absolutely provide you adequate services.
1. Straight Vapor
The firm has a great deal to provide. Here you can anticipate performance as well as ease. When you require minimum orders you can get them at a sensible cost. You can get as numerous products as you require. Shipping fee is average, and also you won’t be charged unfairly. There is also a totally free residential shipping with the business. Brand names right here are a large choice to select from treat flavors, chocolate or coffee.
The distribution period is from 1 to 5 days depending on your location. This consists of a 15-day return policy if you didn’t like the vape juice. 60 days warranty is supplied in instance of any type of defection or replacement require develops. The distinct component about Straight Vapor is their consumer assistance solutions. They likewise reward their consumers for getting more than once.
2. Wholesale Vapor
This is the second best vape juice wholesale supplier in the US. All the vape stores can rely on the business for their products. They have matchless brand names that just match their clients. They likewise use reduced wholesale costs for vape juices. Free shipping is ensured to clients that get items from $450 price. Delivery ranges from 2 to 5 days.
3. Vapor Monster
The solutions at Vapor Beast are phenomenal. When you buy vape juices completing to $1,000 you secure free delivery. Within one to 5 days, it will be provided at your front door. You first require to use as a wholesale consumer so regarding strike a business deal. Then you can get to sample the scrumptious e-liquids they provide. You can additionally choose the pure nicotine toughness with a scale of 0 mg to 55 mg. The dimensions will certainly likewise depend on what you require. They are from 1.5 ml to 125 ml.
4. MigVapor
It is prominent to vapers throughout the globe. The vape juices are of great tastes. They additionally come in lots of range to pick from. You obtain blended vape juices from the 89 tastes. Shipping is done from 1 to 5 days of getting the item. The shipping prices are common. If you are not pleased with the vape juice, there is thirty days money back warranty.
5. Vivo Wholesale
The company has a large range of vape juice items. They are distinct kinds of juices. With Vivo Wholesale, you can place bulk orders and likewise the single orders. They deal with both large firms and also people. By opening a Vivo account, you will be ready to start putting orders. The vape juice is meticulously secured and delivered to you the 2nd day. This will take 2 to five days to receive the things.
Final thought
Vape Juice dealers have various plans. Some have minimum orders while others lack them. As a consumer, you now understand which one will certainly suit you. If you need the vape juice to market on a large scale several of them will partner will you. For those who desire the e-liquid for individual use, you can identify the best one for you. After bearing in mind the shipping problems, you recognize where to order from. With some purchase, you obtain absolutely totally free delivery.
Buying from other nations equates to high tax obligations as well as too much shipping expenses. This can be frustrating due to the costs that you will sustain.
The five representatives have pocket-friendly prices thus; you don’t need to spend a lot. You reach delight in the different charming flavors with an excellent budget. Shipment time is additionally reputable which takes at many five days.
October 3, 2019 at 5:08 am
We have a couple of assignment writing services USA on StudentsAssignmentHelp.com. Students can hire our experts to get assignment writing services USA with us at a very cheap price.
October 3, 2019 at 7:38 am
This is amazing to charge, plug the supplied cable into the input port on the battery pack.
October 3, 2019 at 7:39 am
Is it easily available in the market?
October 5, 2019 at 12:16 am
Learn How to Check Canara Bank Account Balance Through Missed Call Canara Bank is one of the leading banking sectors in India. The Government of India handles the operations of Canara Bank. The headquarters of Canara Bank is located in Bengaluru. Originally, this bank has started its services in the year 1906 at Mangalore.
October 5, 2019 at 4:40 am
What’s up friends, its wonderful article concerning educationand completely defined, keep it
up all the time..
October 8, 2019 at 7:38 am
We will assist you with for Online Task Help. All understudies visit today our site and locate the best help for themselves. As we ensure that your questions and inquiries must be settled on the grounds that that is our rationale as we need our understudies to go easily and strain free.
October 8, 2019 at 7:39 am
Our homework help website also offers very affordable academic writing help. Although other homework help websites may tend to be greedy, well this is not our goal. We are goal oriented in helping you acquire academic success. Therefore, we ensure that our prices are realistic and pocket-friendly.
October 8, 2019 at 10:46 am
Juvenile delinquency refers to illegal antisocial behavior displayed by persons who have not reached the adult age. Juveniles despite their age are capable of committing serious crimes. The causes of juvenile delinquency are numerous and debatable. However, the society and law enforcing bodies understand that the responsibility of juvenile crimes cannot be pegged entirely on the juveniles. Therefore it is important that the society finds amicable solutions to help manage Juvenile delinquency. Read more on our web http://essays-writers.net/essays/Justice/causes-and-control-of-juvenile-delinquency.html
October 9, 2019 at 7:22 am
Comment- No more worries about your chemistry homework when you have Chemistry Assignment Help services. If you are unable to write your projects or having doubt over any topic, ask academic writers for more information
October 10, 2019 at 1:28 am
If you are looking for a professional company you can help you with your need for my assignment help services then, get yourself connected to IdealAssignmentHelp now. We have the most reliable and professional team in the business to help you with top-quality assignment writing services. Our experts are highly experienced and educated enough to deliver the goods for you as per your specific needs and requirements. Get Connected now for Assignment Help!
October 10, 2019 at 3:52 am
Law assignment help Malaysia, Malaysia has transformed into a preferred destination in Asia for a large number of overseas students to pursue their higher education. Students from different countries across the world are arriving in Malaysia every year to pursue courses on multiple subjects, including law.
October 11, 2019 at 5:49 am
A strange choice of battery for such purposes when there are more suitable samples. But still not bad.
October 11, 2019 at 2:52 pm
Sometimes, when you get an assignment to write a paper on a very popular book, you can be tempted to read the numerous materials about it available on the Internet and borrow some of the ideas for your paper there. Therefore, click on the title for helpful tips.
October 14, 2019 at 5:39 am
From where can i buy this?
October 15, 2019 at 4:52 am
urgenthomework.com is the best place that offers quality assignment writing services online to the students. We have the best assignment experts that are providing the best quality assignment and writing services at a low price.
October 15, 2019 at 4:54 am
Get quality homework and assignment of all subject at urgenthomework.
October 15, 2019 at 4:55 am
Amazing article. very informative post.
October 17, 2019 at 3:58 am
Keep your mobile device charged at all times with the Rayovac 7-Hour 4-AA USB. Power banks are used for providing portable power to charge battery-powered items like mobile phones and other similar items that have a USB interface.
October 17, 2019 at 7:34 am
We can help you whenever and where ever you want, We are giving services all over world and especially in Australia in following catagories: Assignment help
October 18, 2019 at 3:45 am
You are sharing delightful post. It is effortless and easy to understand for me. Thanks for sharing the post. Moreover, our team provide Assignment Help Australia for all Australian universities.
My Assignment Help
Assignment Help Sydney
October 18, 2019 at 4:46 am
Hello!
If anyone searching for the best staff for our company. Visit my profile.
October 21, 2019 at 3:43 am
This is a truly good site post. Not too many people would actually. the way you just did. I am really impressed that there is so much information about this subject that have been uncovered and you’ve done your best.