Upgrading DIY PowerBank for Smartphones & Other USB Compliant Device

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Introduction: Upgrading DIY PowerBank for Smartphones & Other USB Compliant Device

About: Electronics hobbyist and a DIYer and i love doing this stuff.

This is an upgraded DIY Powerbank projects for:

•DIY 1-Home made Powerbank using AA Batteries

•Links found here:

iPhone DIY Powerbank

https://www.instructables.com/id/iPhone-DIY-PowerBank/

And

•DIY 2- Home made Powerbank using 3 pcs of 18650 2200mAh Li-iOn battery (6600mAh)

•Links found here:

https://www.instructables.com/id/iPhoneSmartphone-DIY-Powerbank/

Step 1: Before & After Upgrade

*Images below shows the following:

Image 1 "Before"
Image 2 "After"
Image 3 "Rechargeable AA NiMh type @ 2800mAh

Step 2: *Type of Battery Connections

How to wire Batteries &

How Battery works -simplified

Image 1

•DIY 1 Powerbank using AA batteries used "Serial Connection"

Step 3: USB Step Down Chipset

•Batteries used for upgrading DIY 1 Powerbank 2800 mAh NiMh x 8 pcs in Series connection

= 1.5v x 8 = 12v dc •Upgrade from Single USB chipset upgraded to Dual USB chipset 12vdc input to 5vdc output via USB

Slot 1 = 2.1 mAh Slot 2 = 1.0 mAh

Step 4: AA NiMh Powerbank Specs

DIY 1 Project Specs:

•2800 mAh

•Weight = 220 g = 7.7 oz

•Size: Width = 3.5 " Height = 2.0 " Depth = 2.0 "

Step 5: *Performance/Tests/battery Options

Performance upon tests:

• Can full charge iPhone 4 plus 40% left juice using NiMh 2800 mAh

•Other Types of AA Batteries Specs in mAh (capacity)

•Primary (non-rechargeable) zinc–carbon (dry cell) AA batteries have around 400–900 milliamp-hours capacity •Zinc–carbon batteries are usually marketed as "general purpose" batteries. Zinc-chloride batteries store around 1000 to 1500 mAh are often sold as "heavy duty" or "super heavy duty". •Alkaline batteries from 1700 mAh to 3000 mAh cost more than zinc-chloride batteries, but last proportionally longer.

•List of other Battery Types
http://en.m.wikipedia.org/wiki/List_of_battery_sizes

Step 6: *DIY 2

•Minor upgrade was applied here(before it was transparent that can be mistaken as a dangerous device.
•Spray painted with metallic Black

Step 7: *Battery Wirings Simplified

How Battery works -simplified for this project

•DIY 2 uses Parallel Connection

Step 8: Wiring Diagram

• How to wire:

Very simple!

Step 9: *DIY 2 Project Specifications

DIY 2 project Specs:

• 6600 mAh (2200mAh x 3)

•USB and Micro USB support

- Input 5vDC via Micro USB - Output 5v DC via USB

- 800 to 1.0 Ah charger is required to charge powerbank

•with Auto Stop Charge and Discharge controller chip

• 9 hrs to full charge powerbank via MicroUsb

•Led light indicators

Blue- when discharging

Red- when charging powerbank

• compatible to any USB compliant device like mp3s,digicams,router,pocket wifi ,portable DVDs,smartphones & tablets.

•Weight =230 g

= 8.11 oz

Step 10: DIY 2 Project Specification

DIY 2 project Specs:
• 6600 mAh (2200mAh x 3)
•USB and Micro USB support
- Input 5vDC via Micro USB
- Output 5v DC via USB
- 800 to 1.0 Ah charger is required to charge powerbank
•with Auto Stop Charge and Discharge controller chip
• 9 hrs to full charge powerbank via MicroUsb
•Led light indicators
Blue- when discharging
Red- when charging powerbank
• compatible to any USB compliant device like mp3s,digicams,router,pocket wifi ,portable DVDs,smartphones & tablets.
•Weight =230 g
= 8.11 oz

Step 11: Test Results

Performance upon tests:
• Can full charge iPhone 4 and HTC Sensation up to 3 Times
from low battery stage of 15%
• Can 1 time full charge an iPad mini from low battery stage.


•added more images of upgrade

Step 12: Instructables Links

Links on How to build Powerbank using AA Batteries

Titled
iPhone DIY Powerbank

https://www.instructables.com/id/iPhone-DIY-PowerBank/



•Links on How to build iPhone/Smartphone DIY Powerbank

https://www.instructables.com/id/iPhoneSmartphone-DIY-Powerbank








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    47 Discussions

    0
    mechanich
    mechanich

    2 years ago

    Thanks for this useful Instrucable for a useful product. May I ask if someone knows the campain on kickstarter from 2016 or 2017 for a ready made power bank housing that fits universally for all (?) flat smartphone batteries (inside, as in your Instructable) . Of course I didn't forget to bookmark it! -Ahm...

    ...today I want to make something else, a little experiment with you that's called: "Is there swarm intelligence?" if so, then please gimme a hint about a name or WWW Address of the shenzen startup that invented the mentioned ready made power bank housing (looks like an extern Harddisk housing):-). Greetings from sizzling hot and humid Munich, home of Oktoberfest, Germany.

    Edit: may I introduce myself. I am a German Mechanical Engineer and say hello as a newbie! We're having a "makers' scene" in Germany as well. May I state that we in Germany don't really know if we're having a lack of engineers. This, the indecision in this point is known in the US as well. I find it good that this question was discussed in the US, while in Germany there is no discussion about that point. Everybody thinks that he knows whether this lack exists (I don't, in general, because Diploma Engineers have a huge variety). Thank you for reading.

    0
    LorenzoB
    LorenzoB

    4 years ago

    Hello! Can I put in 5x18650 Li-ion batteries connected to a circuit that was originally designed to hold one (I will be changing the case). But just wondering about the amperage/voltage. Also, should they be wired in parallel or in series? I would like to get a constant 5v 1A out through a single USB (like in your design 1)?

    Thank you!

    0
    rodski
    rodski

    Reply 4 years ago

    That depends on your chip,check your chip datasheet first.And read my article

    "How Powerbank Works" here :

    https://www.instructables.com/id/PowerBanks-How-It-Works/

    0
    Hamidi5
    Hamidi5

    4 years ago

    Very good

    Thanks

    0
    SanchitK4
    SanchitK4

    4 years ago

    Can i charge my phone with ni mh batteries?

    0
    rodski
    rodski

    Reply 4 years ago

    yes,you can use high capacity NiMh battery to charge your phone.

    0
    JanR31
    JanR31

    5 years ago

    where can i find a step-up regulator?? can i find it from old electronics?

    0
    TheGhzGuy
    TheGhzGuy

    5 years ago

    Hello there!

    Just curious, where did you get that Micro USB + USB Type A Female, thing?

    "Input 5vDC via Micro USB - Output 5v DC via USB"

    Thanks!

    0
    TheGhzGuy
    TheGhzGuy

    Reply 5 years ago

    Thank you so much! That's very helpful!

    0
    rodski
    rodski

    5 years ago

    @ejsixthman
    That depends on your battery capacity and what method are you gonna charge it.If you are building a home made powerbank.,i suggest you read my article here:
    https://www.instructables.com/id/PowerBanks-How-It-Works

    0
    rodski
    rodski

    5 years ago

    @ejsixthman
    Yes you can use 2 amp to charge your device for as long as your device support 2amp charging.

    0
    rodski
    rodski

    5 years ago

    Some single usb car charger had an LED indicator too.,just look for the ones that have an indicator like this.
    http://m.ebay.com/itm/Dual-USB-2-Port-DC-Car-Charger-2-1A-Adapter-Black-for-Samsung-Galaxy-S5-Note-4-3-/111315640272?_trkparms=aid%253D222007%2526algo%253DSIC.MBE%2526ao%253D1%2526asc%253D20150519202348%2526meid%253D0b95dbe2c1c04658abe630c43517e15c%2526pid%253D100408%2526rk%253D4%2526rkt%253D15%2526mehot%253Dpp%2526sd%253D231563235038&_trksid=p2056116.c100408.m2460

    0
    ejsixthman
    ejsixthman

    5 years ago on Introduction

    if the car charger dont have led indicator?

    i use the single car charger

    the dual car charger have a indicator?