<p>You should store the battery fully charged as little as possible; a few days is probably fine, but when it gets closer to a week or more you might start to see it's health degrading. That said, there is no hard limit where it will stop working, so my advice is to charge it when you are going to use it, and then charge / discharge it to 3.8 V / cell when you are done.</p>

<blockquote>
  <p>A battery sitting at room temperature fully charged will lose about 20% of its capacity in a year. A battery sitting at 60 degrees Celsius will lose 40% of its capacity in just 3 months.</p>
</blockquote>

<p><a href="https://brushlesswhoop.com/storing-fully-charged-lipo-batteries/" rel="nofollow noreferrer">https://brushlesswhoop.com/storing-fully-charged-lipo-batteries/</a></p>

CC BY-SA 4.0
2020-04-14T21:14:37.970Z
That seems like what I usually try to do, but sometimes fail. I have seen the rule-of-thumb limit of 2 days myself. Some sources seem to suggest much longer limits though. Just to be on the safe side, I would probably stick to the lower ones myself, although 20%/yr compared to about 1%/mo @ storage (see Robin Bennett's answer) doesn't sound as bad as I thought...
Michał Trybus
CC BY-SA 4.0
2020-04-14T20:36:15.080Z
2020-04-21T04:36:04.470Z
2020-04-21T04:36:04.470Z
Hannes Hultergård
<p>4-max (a UK battery supplier) recommend storage charge for anything over 1 month:</p>

<blockquote>
  <p>If you plan to store your LiPo cells for an extended period (over 1 month), discharge them as you would normally. Then charge them to only 3.80V/3.85V per cell. </p>
</blockquote>

<p><a href="https://www.4-max.co.uk/pdf/prolong-life-lipo.pdf" rel="nofollow noreferrer">https://www.4-max.co.uk/pdf/prolong-life-lipo.pdf</a></p>

CC BY-SA 4.0
2020-04-14T20:50:20.847Z
2020-04-14T20:50:20.847Z
Robin Bennett
<p>Is there any research that shows the actual decrease in capacity/performance/longevity of high discharge current LiPo batteries, like those used in quadcopters, depending on the total time they spent being fully charged? Maybe there are some chemical processes that start to occur after some time of being charged which should be avoided and the time until they start being harmful can be measured or calculated...</p>

<p>What rule of thumb (that can be scientifically backed, or would at least be an educated guess) can we assume to keep the batteries in good shape without being too extreme?</p>

<lipo-batteries>
What is a safe amount of time a LiPo pack can be kept fully charged before it is discharged to storage capacity?
Michał Trybus
# What is a safe amount of time a LiPo pack can be kept fully charged before it is discharged to storage capacity?

(Asked by: username_0 on 2020-04-14)

Is there any research that shows the actual decrease in capacity/performance/longevity of high discharge current LiPo batteries, like those used in quadcopters, depending on the total time they spent being fully charged? Maybe there are some chemical processes that start to occur after some time of being charged which should be avoided and the time until they start being harmful can be measured or calculated...

What rule of thumb (that can be scientifically backed, or would at least be an educated guess) can we assume to keep the batteries in good shape without being too extreme?

**Tags:** lipo-batteries


---

## 2 answers

### Answer by username_1 on 2020-04-14. Score: 5

You should store the battery fully charged as little as possible; a few days is probably fine, but when it gets closer to a week or more you might start to see it's health degrading. That said, there is no hard limit where it will stop working, so my advice is to charge it when you are going to use it, and then charge / discharge it to 3.8 V / cell when you are done.

> A battery sitting at room temperature fully charged will lose about 20% of its capacity in a year. A battery sitting at 60 degrees Celsius will lose 40% of its capacity in just 3 months.

<https://brushlesswhoop.com/storing-fully-charged-lipo-batteries/>

> **Comments:**
> **username_0**: That seems like what I usually try to do, but sometimes fail. I have seen the rule-of-thumb limit of 2 days myself. Some sources seem to suggest much longer limits though. Just to be on the safe side, I would probably stick to the lower ones myself, although 20%/yr compared to about 1%/mo @ storage (see username_2 username_2's answer) doesn't sound as bad as I thought...  

---

### Answer by username_2 on 2020-04-14. Score: 1

4-max (a UK battery supplier) recommend storage charge for anything over 1 month:

> If you plan to store your LiPo cells for an extended period (over 1 month), discharge them as you would normally. Then charge them to only 3.80V/3.85V per cell.

<https://www.4-max.co.uk/pdf/prolong-life-lipo.pdf>


---

