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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    46 Comments

    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!

    1 reply

    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/

    Very good

    Thanks

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

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

    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!

    2 replies

    Thank you so much! That's very helpful!

    @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

    i have 9 laptop battery how long do i need to charge it

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

    i cant buy car charger with micro usb can i use a usb 2 A?

    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

    if the car charger dont have led indicator?

    i use the single car charger

    the dual car charger have a indicator?

    can i add you on facebook?

    what kind of car charger did you buy

    how do i put the led indicator?

    @ejsixthman
    The car charger i used here has a prebuilt LED indicator.