We have used a tornado battery for the past 2 years now. its doing well and getting my son to and from work, last year it was to and from school 5 days a week. 4 months a year. plus him going to friends and such. So it is a solid battery. I am looking to upgrade to a tornado 2 for the skatebolt board and moving the tornado battery will go to the DIY board. So absolutely no complaints as all. Thank you for the quality gear.