Cool Power 18.2ah model. Bought for S$999 six months ago. Have original receipt.
Sparingly used. Just done 117km on odo for six months.
You can test ride it yourself and decide to buy.
These brands come with only 3 months warranty, so obviously not under warranty.
Bought from "Sun Tree" outlet at Kallang Wave Mall. They also do servicing in case of any faults and repairs.