iPhone DIY Powerbank
8*AA NiMH Battery 2800mah
Car mobile usb charger
AA batery holder
AA batteries 8 pcs
Utility box ( i used telephony u box here)
Soldering iron + lead
Scoring Blade ( for hole cutting )
Electrical Tape(a must)
Step 1: Dismantling
Step 2: Placements
Place all the necessary parts according to the size of u-box.,no need to soldered all the wire so you can rearrange it if necessay,making sure you can still close the u-box properly,.otherwise using the u box will be useless for portability.
Step 3: Soldering Wires
Step 4: Run Test
Note:Dont forget to insulate open wire connections by covering it with electrical tape.To avoid unintentional shorting of the wires from bending.
Step 5: More Test
You have just built an affordable Powerbank,a bit bulky.(UBox = 2"depth x 2"height x 3.5"width)
Step 6: Result
It's quite complicated for others,but its not.
No complicated electronic schematic diagrams to analyze,.not much to assemble complicated electronic parts.Just the basics of soldering & wirings.And it's very cheap to make.
USB car charger only cost me 60 Php,
Battery holder 25Php/set x 4 total of 100 Php
Switch cost 20Php
It only cost in total of Php 180.00 (1$= Php40++) on the day i bought on electronic store.
AA Battery cost excluded = Php 30.00 for 8 pcs
All other parts are only spare that i kept.It was really a big savings on my side, instead of buying without the Fun of creating.!
Facts about AA Batteries
•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.
• i used ordinary AA Battery for this project and based on this facts it would range this project on specs of 500 mah ,.actual measured on app installed....,meanwhile using rechargable AA batterries would be a great added savings on user.,+++