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Custom Charging Backpack

TheNuzziNuzz
By TheNuzziNuzz
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I'm looking to build an all in one backpack solution that can charge the following devices all at once at least one time each, and have more left over.

  • Microsoft Surface pro 4 2.58a 12v
  • Phone  1-2a 5v
  • Android 2.85a 5v
  • iPad 2.1a 5.1v

I am looking for a DIY soloution, but I have a relatively limited understanding of electricity.

 

There are complete options out there but they are super expensive, and pre made, which leaves no fun for me! I was looking into standalone recharable Li-Ion batterys, and connecting multiple smaller battery banks in series, but I have no clue how to do it right. I can solder.

 

How do I calculate how much MAH each device will need per full charge?

How do I connect multiple smaller battery banks?

What converters do I need to make this happen?

Should I purchase 12v battery banks to connect and convert them to 5v for the other devices, or 5v battery banks at higher wattage and convert up for the Surface?

 

I have more to spend, but I want to do it for under 100 USD, which I think is doable considering how many 5v 10,000mah portable batterys there are on amazon for $20.

 

Thanks for sharing your experience/knowledge. I hope to make a post logging and explaining each step of the way after I get it working for myself!

Computers r fun

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2 minutes ago, TheNuzziNuzz said:

 

I am looking for a DIY soloution, but I have a relatively limited understanding of electricity.

 

maybe dont then?

 

id just buy a power pack for each device and tape that to the backpacks inside or something. 

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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Just now, Bananasplit_00 said:

maybe dont then?

 

id just buy a power pack for each device and tape that to the backpacks inside or something. 

I am all about doing stuff Im not familiar with to expand my experience and knowledge. Let me rephrase, I understand electricity, I just don't have experience working with it. Thats what this project is for.

Computers r fun

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2 minutes ago, Bananasplit_00 said:

-Snip-

id just buy a power pack for each device and tape that to the backpacks inside or something. 

I wan't it all in one big battery because I never know how much of what Im gonna need, and I want to be able to charge everything with one cable.

Computers r fun

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1 minute ago, TheNuzziNuzz said:

I am all about doing stuff Im not familiar with to expand my experience and knowledge. Let me rephrase, I understand electricity, I just don't have experience working with it. Thats what this project is for.

makes more sense then, duknow how you would do this good but buying cells of ebay is something you can do so that could be a way to get your capacity

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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Just now, Bananasplit_00 said:

makes more sense then, duknow how you would do this good but buying cells of ebay is something you can do so that could be a way to get your capacity

If I just connect them in series, will it add the voltage and/or the amperage? And how would I recharge them?

Computers r fun

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1 minute ago, TheNuzziNuzz said:

If I just connect them in series, will it add the voltage and/or the amperage? And how would I recharge them?

series should be more voltage, paralel more capacity. you would have to build/scavange a chargeing circut, dont know how you would do that exactly but i know you would need one

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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1 minute ago, Bananasplit_00 said:

series should be more voltage, paralel more capacity. you would have to build/scavange a chargeing circut, dont know how you would do that exactly but i know you would need one

I found this

If I got two of them and connected the output in parrellel, would I have 12v 6,000 mah?

Computers r fun

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1 minute ago, TheNuzziNuzz said:

I found this

If I got two of them and connected the output in parrellel, would I have 12v 6,000 mah?

you should unless i remmeber this stuff wrong and my logical thinking also severly failed me :P 

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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Just now, Bananasplit_00 said:

you should unless i remmeber this stuff wrong and my logical thinking also severly failed me :P 

Your spelling has definitely failed you lol. I will ask a few others. And could I connect the batteries to this?

Computers r fun

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3 minutes ago, TheNuzziNuzz said:

Your spelling has definitely failed you lol. I will ask a few others. And could I connect the batteries to this?

you definatly could hook it up to that. should work if you want a basic indication of how much juce you got

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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Just now, Bananasplit_00 said:

you definatly could hook it up to that. should work if you want a basic indication of how much juce you got

Cool. Then could I connect multiple converters/transformers in parallel to the output of the display thing to go to the Surface Charger and usb ports for phone/tablets?

Computers r fun

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22 minutes ago, Bananasplit_00 said:

you definatly could hook it up to that. should work if you want a basic indication of how much juce you got

This looks like a more promising battery: https://www.amazon.com/EasyAcc-20000mAh-Dual-Input-External-Portable/dp/B01422TC14/ref=pd_lpo_vtph_107_bs_tr_t_2?_encoding=UTF8&psc=1&refRID=CTPCC0ANA6Z2PY2S7J4C

 

Would it still work if I modded a USB cable?

Computers r fun

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52 minutes ago, TheNuzziNuzz said:

Cool. Then could I connect multiple converters/transformers in parallel to the output of the display thing to go to the Surface Charger and usb ports for phone/tablets?

possiably, i dont really know how much current flow that thing can take but if it can handle it then yah you can probably do that.

31 minutes ago, TheNuzziNuzz said:

This looks like a more promising battery: https://www.amazon.com/EasyAcc-20000mAh-Dual-Input-External-Portable/dp/B01422TC14/ref=pd_lpo_vtph_107_bs_tr_t_2?_encoding=UTF8&psc=1&refRID=CTPCC0ANA6Z2PY2S7J4C

 

Would it still work if I modded a USB cable?

depends on what you mean with that, like really, what would that entail?

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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21 minutes ago, Bananasplit_00 said:

possiably, i dont really know how much current flow that thing can take but if it can handle it then yah you can probably do that.

depends on what you mean with that, like really, what would that entail?

40,000 Mah, 5v. Enough to charge the average phone 16 times, or a Surface pro 4 twice!

Computers r fun

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8 minutes ago, TheNuzziNuzz said:

40,000 Mah, 5v. Enough to charge the average phone 16 times, or a Surface pro 4 twice!

that would be a pretty good capacity tbh

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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2 minutes ago, TheNuzziNuzz said:

And under 100 USD

if you document it i think you wont be the only one makeing it for that price, thats a really good price

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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2 minutes ago, Bananasplit_00 said:

if you document it i think you wont be the only one makeing it for that price, thats a really good price

Well its only possible because of a 50% prime discount on this product, so to make it otherwise I would have to resort to ebay.

Computers r fun

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4 minutes ago, TheNuzziNuzz said:

Well its only possible because of a 50% prime discount on this product, so to make it otherwise I would have to resort to ebay.

ahh then maybe not lol. anyway have fun with your prodject. google and YT will probably help you better then this forum ever will :P 

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

Spoiler

"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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