Check out BYD forklifts batteries, they are Lithium Iron phosphate which is totally safe and certified so, if you check out youtube you will see that the cells undergo full testing including overcharging, over discharging, fire test, impact and penetration tests, its is lithium polymer that is not so safe, we have some machines in the filed on test with no issues to date and the operators like them.
Full charge from flat in less than two hours and the ability to opportune charge makes them great for multi shift applications.