I brought a 36v silverfish style battery for my e-bike, I usually have to replace them every 5 years. I use my e-bike every day for my work in the community, Sometimes travelling up to 20 miles in a day.
My first charge took me 19 miles and when I got home there was still more power in the battery. This shows that good quality battery cells were used in its construction. Will definitely buy from them again.