Battery safety is a matter of crucial importance. In large size batteries the safety problems are more serious as compared to the small size batteries. When phosphate is used as cathode material, we get a very safe lithium ion battery as Phosphates can withstand high temperatures and hence they are extremely stable in overcharge or short circuit conditions. LFP batteries are generally used in high power applications. These batteries consists of Iron based cathode coated with carbon which improves its conductivity and hence can give 10000 cycles under standard temperature and conditions. Recently MNRE added LFP batteries in their specification sheet for solar applications.