I build electric recumbent bikes in Northern California. I have built one bike for a customer with a 15AH 24V LifePo4 battery from China. The shipping was 100.00 but the price on the battery was about 1/3 of what I have found elsewhere. The battery seemed to do just fine. I got it in about a week. I got to test ride the bike for a few miles before I gave it to the customer, it seemed to run strong. Time will tell. This is one of the duct tape batteries. I have read that others had success with them and I had a guy that wanted to try one on his bike. Best of luck,
Reddy KW