Tips & Tricks
FAQ to Li-Po Battery

Introduction
Lithium ion polymer batteries, or more commonly lithium polymer (Li-Po) batteries are rechargeable batteries which have technologically evolved from lithium ion batteries.

1. Do I need a special charger to charge the Li-Po battery?
Yes. It is absolutely essential that the correct charging scheme is used. Using improper chargers will cause permanent damage to the batteries. Chargers for Li-Po batteries utilize CC/CV charging and have a cut-off function.

2. What is the maximum charge rate?
The recommended maximum charge current is 4.8A. The batteries are known to be capable of accepting higher charge rate but this will reduce the useful life cycle.

When a certain cut-off voltage is reached, the charger will keep the voltage constant and the charging current will decrease until the full state of charge is reached. When using a higher rate than 4.8A, the battery will reach the cut-off more quickly, but at this point it is not fully charged. After switching to voltage constant, it will take longer to reach the 100% of full state.

3. Do I need to discharge the battery after use?
Never! The Li-Po battery must, under no circumstances, be discharged after use. By doing so will not 'equalize' the battery but will permanently damage it. Li-Po batteries do not have a memory effect. You can use it in any charge state without risking loss of capacity or power.

4. How do I store my Li-Po batteries?
When not used, the Li-Po batteries should be charged to approximately half of its maximum capacity. It should be stored in a dry area at room temperature. A 50% charged battery can be stored at temperature between -20°C and 35°C for up to 180 days without the need to recharge.

5. Can I use Li-Po batteries more than once per day?
There is no restriction to the number of uses per day.

6. Can I run my RC car until the battery is dead?
No! Any Li-Po battery is sensitive to being over-discharged. The recommended cut-off is 3.0V per cell. The absolute minimum is 2.7V per cell. If the battery is discharged below 2.7V, permanent damage may occur.

If your electronic speed controller (ESC) allows, set the cut-off to 6.0V. If not, stop driving when your motor loses power, remove the battery from the car and recharge it. Never let the battery rest for a few minutes and then continue driving without first re-charging.

7. How long will my battery last?
In general, the life cycle of a Li-Po battery heavily depends on how it is handled and used. Therefore, it is impossible to specify exactly how long your battery will last. It is recommended limiting the discharge of the battery to 80% Depth of Discharge. Under these conditions, the life cycle of the battery is greater than 1000 cycles.

8. Will my battery go bad if unused for extended periods of time?
It can be stored at 23°C for 6 months and still have more than 90% of the initial capacity, at 45°C for 3 months with more than 80% of initial capacity, and at 60°C for 1 month with more than 80% of initial capacity.

9. Do Li-Po batteries explode if damaged or overcharged?
Any Lithium containing rechargeable battery that is currently on the market has a risk of explosion, fire and smoke emission if treated improperly.

10. How do I dispose of my Li-Po battery?
Each country has regulations concerning recycling of batteries. Please check for the specific regulations applied to your region.

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