Battery

Lithium ion batteries have high energy density and cost less than lithium polymer. Lithium polymer batteries are light weight and have improved safety . However their cost is high (30% average) as compared to lithium ion. Also the the energy density of Li-Polymer battery compared to Li-Ion Batteries is quite less.

Advantages

• High energy density – potential for yet higher capacities.
• Does not need prolonged priming when new. One regular charge is all that’s needed.
• Relatively low self-discharge – self-discharge is less than half that of nickel-based batteries.
• Low Maintenance – no periodic discharge is needed; there is no memory.
• Specialty cells can provide very high current to applications such as power tools.