I want to know few things about lithium ion batteries as I am going to buy it. I have used lithium polymer batteries but I have never used lithium ion batteries. What do you guys think about the power storage of these batteries? Are these batteries safe for the environment? Do these batteries really last long? Are these batteries more efficient than the lithium polymer batteries? I want expert in this field to help me with appropriate information. Eagerly waiting for all replies. Thanks.