Desertprep
1 kW
Please feel free to bump this to another location, or delete it if is inappropriate. I am looking for diy instructions to make a small battery pack for charging cell phones, tablets, etc. I have purchased 10,000 mamp and 20,000 mamp batteries before that are easily available but find that they are not adequate for my needs. They also usually only last 30-40 charges before I have to recycle them. I like to travel by train, most of which don't have electrical outlets in China, and would like to have the ability to go for a week with a cell phone, my watch an 7" tablet and a digital camera. What I am hoping to find is diy instructions that include a schematic and parts list. I have done some soldering and basic electronic stuff in the past, so would be able to take it from there. I am also willing to tackle a bms, or buy one if there is one commercially available.