Summary of Portable Charger for your Smartphone
Summary: The article shows how to repurpose an old phone battery into a portable USB charger by combining an MP1405 5V 1A lithium battery charging board, a DC 3V-to-5V 1A step-up USB converter, and a compatible phone battery. It describes soldering wires to the charger board B+ and B- for the battery, and linking the charger board OUT terminals to the step-up module IN terminals so the step-up module provides USB power for charging a smartphone. A micro-USB on the charger board is used to recharge the internal battery.
Parts used in the Portable Charger for your Smartphone:
- Mp1405 5v 1a Lithium Battery Charging Board (Blue board)
- DC 3V to 5V 1A USB Battery Converter Step Up Module (Red board)
- SAMSUNG OEM EB-L1D7IBA 1850MAH BATTERY FOR GALAXY S II (or compatible phone battery)
- 4 jumper wires ((2) 1.5 inch wires, (2) 2.5 inch wires)
- Soldering Iron
- Solder
- Access to a 3D printer
For a long time I’ve had old back up cell phones taking up space in my desk drawer. I was curious if I could put any of these old phones to some use. I can’t just throw them away so I decided to try and re-purpose one of them as a portable charger for my current smart phone.
Step 1: Materials
- Mp1405 5v 1a Lithium Battery Charging Board (Blue board)
2. DC 3V to 5V 1A USB Battery Converter Step Up Module (Red board)
3. SAMSUNG OEM EB-L1D7IBA 1850MAH BATTERY FOR GALAXY S II
(If you don’t own a Galaxy S II)
http://www.amazon.com/gp/product/B007PSBELE/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
4. 4 jumper wires ((2) 1.5 inch wires, (2) 2.5 inch wires)
http://www.amazon.com/Pre-formed-140-piece-Jumper-Wire-Kit/dp/B005GYB93M/ref=pd_sim_t_3?ie=UTF8&refRID=1CT2Q151JM4F5PDK7Z1A
Tools
1. Soldering Iron
2. Solder
3. Access to a 3D printer
Step 2: Circuit for charging portable battery
Insert and solder the two 2.5 inch wires to the B+ and B- terminals of the “Mp1405 Charging Board”. Each of these wires will be connected to their respective positive and negative contacts on the battery. The “Mp1405 Charging Board” is what will be used to charge the cell phone battery, and will feed power from the battery to the “DC Converter Step Up Module”. The Micro-USB connector on the “Mp1405 Charging Board” will be used to charge the internal battery of the portable charger.
Step 3: Circuit for charging smart phone from portable battery
Using a 1.5 inch wire, connect the OUT(-) terminal of the “Mp1405 Charging Board” to the IN(-) terminal of the Converter “DC Step Up Module”. Do the same thing with the OUT(+) and IN(+) terminals. The USB connector on the DC Step Up Module will be used to connect a micro-USB cable in order to charge a smart phone.
For more detail: Portable Charger for your Smartphone
- What charging board is used to charge the battery?
The Mp1405 5v 1a Lithium Battery Charging Board is used to charge the cell phone battery. - What module boosts battery voltage to USB 5V?
The DC 3V to 5V 1A USB Battery Converter Step Up Module is used to provide 5V USB output. - How are the battery terminals connected to the charging board?
Two 2.5 inch wires are soldered to the B+ and B- terminals of the Mp1405 Charging Board and connected to the battery positive and negative contacts. - How do you connect the charging board to the step-up module?
Use 1.5 inch wires to connect OUT(-) on the Mp1405 Charging Board to IN(-) on the step-up module and OUT(+) to IN(+). - Which connector is used to recharge the internal battery?
The Micro-USB connector on the Mp1405 Charging Board is used to charge the internal battery of the portable charger. - Which connector is used to charge a smartphone?
The USB connector on the DC Step Up Module is used to connect a micro-USB cable to charge a smartphone. - How many jumper wires are required?
Four jumper wires are required: two 1.5 inch and two 2.5 inch wires. - Is soldering required for this project?
Yes, soldering is required to attach wires to the charging board and battery contacts.
