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22 votes
Accepted

Is it safe to fly LiPo batteries after they get "puffy"?

You should dispose of them. A LiPo battery has three parts: the anode (negative plate), the cathode (positive plate), and electrolyte (sandwiched in between the two plates). Electricity is formed by ...
gparyani's user avatar
  • 414
12 votes
Accepted

At what current should I charge a LiPo battery?

Charging Lithium batteries is a far more delicate process than discharging them because of the complex chemical processes involved. Batteries that are rated for tens of "c"s of discharge rate are ...
ifconfig's user avatar
  • 6,008
12 votes

In what situations do puffy batteries pose a risk of ignition?

The risk of a puffy battery exploding during storage is still comparatively low, you shouldn't underestimate it however. During charging the risk of explosion is at its peak. This is also the reason ...
Bastian Springer's user avatar
10 votes

How long can a LiPo pack be kept fully discharged before storage charging?

The most appropriate answer I could find comes from this study which states that a charged LiPo should be returned to storage charge if you do t plan to use it within the next 12 hours, and leaving it ...
Drones and Whatnot's user avatar
10 votes
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How low can I safely discharge a LIPO battery during flight?

The short answer is that you don't want to run batteries below 3.0V ever, and ideally want to avoid large current draw below 3.5V. For a 3S battery, once you start seeing voltages in single digits (3....
Tehllama's user avatar
  • 846
9 votes
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How can I safely parallel charge my LiPo batteries?

Only parallel-charge batteries with the same number of cells. Safe parallel charging requires that the voltages on individual cells be close to each other. A difference of 0.1V per cell is considered ...
Michał Trybus's user avatar
9 votes

In what situations do puffy batteries pose a risk of ignition?

"Puffed" batteries are both more and less dangerous. I am drawing from over 10,000 FPV flights where I beat the mortal sh*t out of lipos and also from over 3000 battery charges I have ...
FunHog.me's user avatar
  • 1,068
8 votes

At what per-cell voltage should I land?

I start my landing approach when the average cell voltage reaches below 3.5V on a stable flight (not counting voltage dips on short, aggressive maneuvers). At that point, you should still have enough ...
abacs's user avatar
  • 111
7 votes
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Can I use two 2s lipo batteries to power my FPV DJI goggles?

Connecting the batteries in series or parallel brings two new issues with it that you need to consider before you start using them and they are both related to batteries that are not on the same ...
Flyback FPV's user avatar
7 votes
Accepted

Can I use LiHV batteries as normal batteries?

Yes, you can. The primary difference between LiHV and LiPo batteries is the ability to change them to ~4.35 V/cell instead of 4.20 V/cell with a nominal cell voltage of 3.8 V instead of 3.7 V. Just ...
ifconfig's user avatar
  • 6,008
7 votes

At what per-cell voltage should I land?

I have found that landing based on voltage is inaccurate. For example, if you look at the voltage in the OSD while you have the stick at full throttle, the Voltage will be lower than if you had it at ...
Schome1's user avatar
  • 1,226
6 votes

How long can a LiPo pack be kept fully discharged before storage charging?

Like the other answer, I couldn't find a specific, good study to go off of for any sort of real statement. The ones I have seen tend to be pretty low sample sizes and somewhat limited scope. What I ...
Carbon Soar's user avatar
6 votes
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Can a lipo battery be charged with more than 0.5 amps?

You definitely can charge your 1205 mAh 6S LiPo at a current higher than 0.5A. For most of the LiPos we use on drones, the recommended charge rate is 1C, which for your battery, would be about 1.2Amps....
Jacob B's user avatar
  • 5,792
5 votes
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Why do LiPo batteries get puffy?

All LiPo batteries face a process called electrolyte decomposition. This means that all LiPo batteries will produce oxygen, some carbon dioxide, and some carbon monoxide through normal use. This ...
Jacob B's user avatar
  • 5,792
5 votes
Accepted

At what voltage per cell should I store a LiPo?

This question seems to be quite the debate in many places. However, the general consensus falls between 3.7 and 3.85v per cell. You can find a similar inquiry here: Storing at 3.7 or 3.85v and here: ...
Jacob B's user avatar
  • 5,792
5 votes

At what current should I charge a LiPo battery?

Despite what others have said, I've safely charged Lipos at 2C for 10 years, without any noticeable negative effects on battery life. Far more damaging is completely draining a battery - if you only ...
strepto's user avatar
  • 356
5 votes
Accepted

Will LiPo batteries deteriorate outside with the temperature changes due to day-night cycle?

The typical temperatures experienced across Europe shouldn't be a problem for LiPo storage; although depending on exactly where you are you may also want to check out this question: Do low ...
Kralc's user avatar
  • 6,056
5 votes

At what current should I charge a LiPo battery?

Generally, when charging LiPo batteries, you should charge them at a 1c charge rate for best longevity. This means that you charge them at 1 amp per amp-hour of capacity. so, for example, you charge a ...
Jacob B's user avatar
  • 5,792
4 votes

At what per-cell voltage should I land?

My personal strategy is to use both voltage and mah as guides. For a 1300mah battery, I'll fly around and if I notice I've used up 1000mah I'll come in and land. However, if I'm flying around and I ...
tavis's user avatar
  • 751
4 votes
Accepted

Is voltage sag safe if the voltage isn't too low?

Yes, voltage sag is perfectly normal and safe for the battery, so long as it remains above the recommended minimum voltage levels. The C rating is important as the construction of a cell affects how ...
Kralc's user avatar
  • 6,056
4 votes

At what per-cell voltage should I land?

You want to keep the battery voltage above 3.2 volts per cell (so 12.8V for a 4S pack) to maximise the lifespan of the battery. Remember that's the voltage once you've landed; you'll need to plan to ...
Kralc's user avatar
  • 6,056
4 votes
Accepted

Are drone batteries more prone to swelling than other li-ion batteries?

I think that puffing is generally a result of overheating, or over-discharging. As you say, drones push their batteries hard. They can use a battery in 5 minutes and can draw very high current peaks ...
Robin Bennett's user avatar
4 votes

Pros/cons of using a BEC in traditional nitro plane?

If you use a BEC you get a few advantages: Input voltage doesn't matter (usually it has to be at least a few Volts above the output voltage), you can probably use the LiPo you already have. The ...
zuim's user avatar
  • 171
3 votes

Will LiPo batteries deteriorate outside with the temperature changes due to day-night cycle?

Will the batteries deteriorate? Yes. Will they deteriorate significantly? probably not. Generally, LiPos are best kept in cooler temperatures and being stored in hot places can harm the battery ...
Jacob B's user avatar
  • 5,792
3 votes

Will LiPo batteries deteriorate outside with the temperature changes due to day-night cycle?

The only thing I know that could damage the battery is extreme temperatures, and based on what you said I think that those temperatures are okay. The difference in temperature between day and night ...
Hannes Hultergård's user avatar
3 votes

Can I use two 2s lipo batteries to power my FPV DJI goggles?

Yes. When we talk about a multi-cell battery like a 4s battery, what we're actually talking about is a collection of cells are connected in series. If you were to disassemble a 4s battery and the ...
Carbon Soar's user avatar
3 votes

Can I use two 2s lipo batteries to power my FPV DJI goggles?

Using two 2s batteries should work just fine. Just make sure that the connecter you buy is a series connecter in order to get the 4s voltage. (series = added voltage, parallel = added capacity). And ...
Jacob B's user avatar
  • 5,792
3 votes

At what current should I charge a LiPo battery?

A LiPo battery should be charged at a maximum rate of 1C, where 'C' is the capacity of the battery in amp hours divided by hours - so a 2200mAh battery can be safely charged at 2200mA (i.e. 2.2A.) For ...
Kralc's user avatar
  • 6,056
3 votes

How can I safely parallel charge my LiPo batteries?

Parallel charging is awesome and can be done safely, but to do this it's important to understand what's going on. First and foremost, of course, you can only parallel connect packs with the same ...
strepto's user avatar
  • 356

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