Lithium-ion Battery vs Lithium-polymer Battery-Which is Better?

When we go shopping for our  much-awaited gadgets, we always check on  the battery capacity whether it has a great battery life or not. We’ve always considered that the larger the battery capacity, the better and longer the battery life.  But that’s not always true and it depends on a lot of other factors as well.

 Right now, there are two main types of batteries available on the market. One is Li-ion batteries, which have long been a part of our smartphones and other portable devices. Lithium Polymer batteries, on the other hand, are now found in most current electronics and most of the new flagship models.We are always confused whether to go with a lithium-ion or a lithium-polymer battery.In this blog, we’re going to review about the differences between Li-ion and Li-polymer battery. 

What is a Lithium-ion Battery?

A lithium-ion battery, often known as a Li-ion battery, is a rechargeable battery made up of cells in which lithium ions travel from the negative electrode to the positive electrode through an electrolyte during discharge and then back again during charging.


  • High power density
  • Easy maintenance
  • Continuous voltage
  • Variety of models available
  • Higher Battery Life
  • Smaller and Lighter
  • Low self Discharge
  • No Priming
  • Available at different price
  • Reduced energy use


  • High cost
  • Protection Required
  • Aging
  • Immature technology
  • Safety Concern

What is a Lithium Polymer Battery?

A lithium polymer battery, or more precisely a lithium-ion polymer battery (abbreviated as LiPo, LIP, Li-poly, lithium-poly, and others), is a lithium-ion rechargeable battery using a polymer electrolyte rather than a liquid electrolyte. They’re also lightweight, have a low profile, and have a lower risk of electrolyte leakage. However, Li-Po batteries aren’t perfect because they’re more expensive to make and don’t have the same energy density or lifespan as lithium-ion batteries.


  • Safety performance is good
  • More thin thickness, and can do more thin
  • Light-weight
  • Big capacity
  • Small internal impedance
  • Shape can be customized
  • Better discharge characteristic


  • Compared with lithium ion battery energy density and cycle number are falling
  • Cost higher
  • There is no standard shape, most battery manufacturing for high volume consumer market
  • Compared with lithium ion batteries, price and energy is higher

Lithium-ion Battery vs Lithium-polymer Battery


ParametersLi-ion batteryLi-polymer battery
Usable voltage rangefrom 3V to 4.2VFrom 3V to 4.2V
Energy DensityHigh energy densityLow and decreased cycle count compared to Li-ion
Safety/Explosive riskMore volatile as compared to Li-PoMore safety. Less chances to explosion
WeightRelatively heavierLight weight
Charging DurationRelatively longer chargeShorter charge
CostCheaperSlightly expensive
CapacityRelatively lowersame volume Li-Po batteries, capacity is around 2 times of Li-ion battery
AgingLoses actual charging capacity over timeRetains charging capacity better than Li-ion
Temperature range usage-20 to 60º C-20 to 70º C
Charge temperature 0 to 40º C0 to 40º C
Storage temperature  -20 to 35º C-20 to 35º C
Impedance<100 mΩ<50 mΩ
ApplicationsUsed in power backups/UPS, Mobile, Laptops, and other commonly used consumer electronic goods. Also used in Electric mobility and Energy Storage SystemsMostly used in radio controller equipment and aircrafts,Mobile, laptops and other commonly used electronic products. Also, used in Electrical vehicles.

Hope, this blog helps you to understand the  actual difference between Lithium-ion and Lithium- Polymer batteries. We will be back with more informative blogs soon.

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