Hello i’m newbe…i ask for my idea…how i can build a power bank 9000 mah with 3 battery LG G2 ? Where i can find store not expensive for buy original battery ?
I think my idea of power bank have input 2A 5V output 2.1 or 2.4 A 5 V Which components would need ?
How can balance charge and discharge, there is a problem with store charge?
Hi!
Sounds like that it would be better and cheaper if you just buy this:
I understand now there are lipo and lifepo4
The lipo not have to discarge at 3.8v
Simply should be stored at about 50% or less charge (the same for lion)
No point in using LiPo for a power bank because it’s not safe to leave it fully charged. Lifepo4 not a good idea neither because of a low weight/capacity ratio. Also You won’t find a 3.7v to 5V 2A boost circuity with good efficiency at a reasonable price.
The Xiaomi power bank is about the best you can get for the money, In fact it is cheaper to buy a Xiaomi 10,000mAh than the 3 cells inside separately.