Inside the well known altoids tin lies three 2,200 mah lithium ion batteries. All three are ran in parallel to create a 6,600 mah or 6.6 amp battery. Which triples the charge time! Meaning if one battery can charge your phone 75 percent than three can triple that! 75x3=225 percent!
This project was made using three individual 'powersticks' which had one 2,200 mah battery on the inside. I picked up three of these for a very nice price and decided to see if I could maybe combine all three batteries to create a longer lasting USB battery bank and I did just that. I know that working with lithium ion batteries can pose a risk when being worked on so let me clarify that I did take extreme caution when making this. After I made it I tested everything I could to ensure a safe hack.
Since the battery size has now evolved to 6,600 mah it will charge my phone longer which is good but it will also triple the charge time for the battery bank. The charge controller is rated at 1 amp and the package also suggests using a charger no higher than 1 amp to charge the battery. Since it is now a 6,600 mah battery it could take a few hours to charge depending on the charger used, but charging it while you sleep helps pass the time.
Be careful and do this project at your own risk!