I think most people have meet a trouble like this: When you bought a new drone lipo battery and your drone can fly about 15-20 mins, but as time goes by, you will found your drone’s flight time get shorter and shorter. Why is it so? Each battery have its life, when it use very often, its life and capacity will get small, so we need to maintain our lipo batteries. About How to maintain a battery, mainly is charge and store, there are two guides about charge and store.
How to Charge a LiPo Battery Safely
When it comes to charging your LiPo battery is very important to never leave a LiPo to charge unsupervised, I have read a few too many stories of fires starting because someone did not monitor their batteries while they where charging. Most of the time fires start because inferior b-grade LiPo batteries are used. If you use premium brand Lipo batteries such as Gens Ace you will not need to worry as they have all undergone rigorous safety tests and have the certifications to prove it. Here I will discuss a few rules you must follow while charging your batteries.
Before I get into the rules I also wanted to state that I am assuming you are using a LiPo battery charger. If you don’t know much about LiPo battery chargers check out our Lipo charger buying guide.
- Never charge your battery unattended – from time to time check to see if your battery is getting warm to the touch or starts to sewll, if so stop charging immediately and contact an expert immediately (like someone on dronetrest) before using the battery again.
- Never charge a damaged battery – dont charge if it is swollen (puffy) or has any other visible signs of damage
- Always charge your battery at 1C or less – many chargers allow you to set a charging rate, although most batteries can support up to 5C charge rates (which makes charging your battery much faster). Its always best to charge at 1C or less as this means the chemicals inside your battery will gain energy slower which keeps them more stable and ultimately means your battery will have a much longer life in terms of charge/discharge cycles.
- Try to charge your batteries in a fireproof location, or in a lipo safe bag. – this just adds an extra layer of protection
- Ensure the number of cells and battery type are set correctly on your charger to match the cell count in your battery. – this is only applicable for more advanced chargers.
During the charge process the battery charger will constantly monitor the voltages of each cell and charge/discharge them to ensure they all the same. This is known as balance charging which all Lipo battery chargers do.
How to safely storage your LiPo Battery?
As mentioned before, Lipo batteries have a voltage range per cell for the chemicals to stay stable. However when it comes to storing your LiPo battery there are some best practices to ensure you get the most life out of it.
- You should always store your battery at 3.8V per cell (40% to 50% charge). This is why whenever you receive a battery, it will only be half charged. If you are flying on a regular basis (every few days) then this is less important as it will not have any noticeable effect if left fully charged for a few days, but if storing for a week or more you should ensure it is at around 50% charge.
- Always store your batteries in a fireproof location. You can always use a Lipo Safe back which is made from fire resistant material.
- Ensure the batteries are stored at room temperature.
There is a Lipo Battery Storage rules from GensTattu Lipo battery guide:
- Do not directly connect the terminals with metal objects. This will short-circuit Batteries, resulting in heat and electrical discharge.
- Never store loose Batteries together, the Batteries’ terminals may contact one another causing a short circuit.
- Never storage Batteries to extreme temperatures or direct sunlight. The battery should be stored within -10℃ ~ 45℃ range environmental condition. If the battery has to be stored for a long time (Over 3 months), the environmental condition should be:
The voltage for a long time storage should be 3.6V~3.9V range per cell.
- Always disconnect Batteries when not in use and store Batteries in a non-conductive and fireproof container.
- Never alter, puncture or impact Batteries or related components.
A High quality Lipo batteries are not cheap,you should take good care of your lipo battery; if you need to buy High quality lipo batteries for your drone, I recommend you can choose Gens Ace & Tattu lipo battery.