My answer to What is the difference between Li-ion and Li-polymer battery? Which one is best?

Answer by Allen He:

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Lithium-Ion Battery

Lithium-Ion Batteries began their development in 1912. However, they did not become popular until they were adopted by Sony in 1991. Lithium Ion Batteries have high energy-densities and cost less than lithium-polymer batteries. In addition, they do not require priming when first used and have a low self-discharge. However, lithium-ion batteries do suffer from aging – even when not in use.


Type

Secondary

Chemical Reaction

Varies, depending on electrolyte.

Operating Temperature

4º F to 140º F ( -20º C to 60º C)

Recommended for

Cellular telephones, mobile computing devices.

Initial Voltage

3.6 & 7.2

Capacity

Varies (generally up to twice the capacity of a Ni-Cd cellular battery)

Discharge Rate

Flat

Recharge Life

300 – 400 cycles for 100%

Charging Temperature

32º F to 140º F (0º C to 60º C)

Storage Life

Loses less than 0.1% per month.

Storage Temperature

-4º F to 140º F ( -20º C to 60º C)

Disposal

  • Can be recycled by dropping them off at any of our over 7,200 stores nationwide.
  • Should be recycled through your local RadioShack store.

Other Notes

  • Typically designed to be recharged in the device rather than in an external charger.
  • The chemical construction of this battery limits it to a rectangular shape.
  • Lighter than nickel-based secondary batteries with (Ni-Cd and NiMH).

Lithium-Polymer Battery

Lithium-polymer batteries can be dated back to the 1970’s. Their first design included a dry solid polymer electrolyte that resembled a plastic film. Therefore, this type of battery can result in credit card thin designs while still holding relatively good battery life. In addition, lithium-polymer batteries are very lightweight and have improved safety. However, these batteries will cost more to manufacture and have a worse energy density than lithium-ion batteries.


Type

Secondary

Chemical Reaction

Varies, depending on electrolyte.

Operating Temperature

Improved performance at low and high temperatures.

Recommended for

Cellular telephones, mobile computing devices.

Initial Voltage

3.6 & 7.2

Capacity

Varies depending on the battery; superior to standard lithium-ion.

Discharge Rate

Flat

Recharge Life

300 – 400 cycles

Charging Temperature

32º F to 140º F (0º C to 60º C)

Storage Life

Loses less than 0.1% per month.

Storage Temperature

-4º F to 140º F ( -20º C to 60º C)

Disposal

  • Can be recycled by dropping them off at any of our over 7,200 stores nationwide.

Should be recycled through your local RadioShack store.

Other Notes

  • Typically designed to be recharged in the device rather than in an external charger.
  • Lighter than nickel-based secondary batteries with (Ni-Cd and NiMH).
  • Can be made in a variety of shapes.

What is the difference between Li-ion and Li-polymer battery? Which one is best?

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