How to test lithium polymer battery life?

Lithium Polymer Battery Life

The lifespan of a rechargeable lithium polymer battery depends on several factors, such as usage, discharge rate, charging practices, storage conditions, and overall quality. On average, a lithium polymer battery can last anywhere from 300 to 500 charge cycles before its capacity degrades significantly. A charge cycle is defined as a full discharge of the battery followed by a complete recharge.

The actual lifespan of a lithium polymer battery may vary depending on the following factors:

Discharge rate: High discharge rates can cause the battery to heat up, which may lead to a shorter lifespan. Choosing a lithium polymer battery with a suitable discharge rate for your application is important.

Charging practices: Using a balance charger specifically designed for LiPo batteries, charging at an appropriate rate (typically 0.2-0.5C), and not overcharging the battery will help prolong its lifespan.

Storage conditions: Storing a lithium polymer battery at room temperature (20-25°C) and at a storage voltage of approximately 3.8 volts per cell will help maintain its health and prolong its lifespan.

Proper use: Avoid over-discharging the battery, which can significantly reduce its lifespan. Most LiPo batteries should not be discharged below 3.0 volts per cell.

Battery quality: High-quality lithium polymer batteries from reputable manufacturers tend to have a longer lifespan due to better materials and manufacturing processes.

Remember that as a lithium polymer battery ages, its capacity will gradually decrease, and its internal resistance will increase, leading to reduced performance. Regularly monitoring your battery’s health will help you determine when it’s time to replace it.

Lithium Polymer Battery Life

To test the life of a lithium polymer battery, you can perform a capacity test to determine how much of its original capacity the battery retains. Here’s a step-by-step guide on how to test a lithium polymer battery’s life:

  1. Gather the necessary equipment: You’ll need a lithium polymer battery charger with a discharge function, a multimeter, a LiPo safe bag or fireproof container, and a notepad or digital device to record the results.
  2. Fully charge the battery: Charge the lithium polymer battery using a balance charger to ensure that all cells are charged evenly. Ensure that you’re using the recommended charging rate for your battery (usually 0.2C-0.5C).
  3. Discharge the battery: Using the charger’s discharge function, set the discharge rate (usually around 0.5C to 1C) and the cutoff voltage (typically 2.75V or 3.00V per cell). Begin the discharge process, and the charger will discharge the battery down to the cutoff voltage while monitoring the discharged capacity in milliamp-hours (mAh).
  4. Record the results: Once the discharge is complete, note the discharged capacity (mAh) displayed on the charger. This value represents the current capacity of the lithium polymer battery.
  5. Compare the results: Compare the discharged capacity with the battery’s original rated capacity (found on the battery label). If the discharged capacity is significantly lower than the original capacity, this indicates that the lithium polymer battery life has degraded.
  6. Perform multiple tests: To obtain more accurate results, you can repeat steps 2-5 a few times and calculate the average capacity.

Keep in mind that this test only provides an estimation of the lithium polymer battery’s life based on its current capacity. Other factors, such as increased internal resistance, may also impact the battery’s performance and overall lifespan.

Why choose LiPol Battery Co., Ltd?

LiPol Battery Co., Ltd is an ISO 9001 qualified rechargeable lithium polymer battery manufacturer, we have over 20 years of experience in sales and production of lithium polymer batteries. Our lithium polymer batteries and 18650 li-ion batteries are popularly used in electronic products, wearable devices, and medical products. We provide a wide range of 18650 lithium-ion batteries and lithium polymer batteries designed to meet your diverse needs.

LiPol Battery Co., Ltd provides standard and exclusive lithium polymer batteries.  Our product lines have 18650 li-ion batteries, high discharge rate 18650 batteries, standard lithium polymer batteries, 3.8V lithium polymer batteries, 2S 2P lithium polymer battery packs, ultra-thin lithium polymer batteries, round lithium polymer batteries, micro lithium polymer batteries, cylindrical lithium polymer batteries, hard case li-ion batteries, RC lithium polymer batteries

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How to order lithium polymer batteries?

1. Send your Requirements
Find us through the sidebar contact form, send us your requirements for the lipo battery, such as dimensions(thickness x width x length), voltage, capacity, max working current, protection circuit module(PCM), wires request, thermistor(NTC), connector type, etc. We will recommend the best suitable rechargeable lithium polymer battery for you.
2. Quotation
When we receive your inquiries, we will reply to you within 12 hours. We mainly communicate by email.
3. Order Process
When you are ready to place lithium polymer battery orders with us, we will confirm the battery models, quantities, prices, and other details, and send you an invoice for payment. We accept PayPal payments, credit cards payment, and bank transfer payments. Then, we will arrange your order. The lead time depends on specific orders.
4. Shipment
When we finish the lithium polymer batteries, we will ship them via DHL/UPS/FedEx air shipping, it is safe and fast. And, we will send the tracking number to you when we get it.
5. Warranty
Our warranty for the lithium polymer battery is one year after the sale. (Refund or resend batteries)
Range of warranty: There is low voltage, expansion, or leakage with the correct use of the lithium polymer battery in the warranty period.