<p><strong>TLDR; The drone will work the same</strong></p>
<p>Given that weight is not an issue here (which might be the biggest concern in the real world), the only things we need to take into account are voltage and current.</p>
<p>As you can find in this <a href="https://electronics.stackexchange.com/questions/175222/is-it-really-ok-to-supply-more-current-than-what-the-component-is-rated-for/175234">question</a> and <a href="https://electronics.stackexchange.com/questions/352619/does-the-battery-determines-the-amount-of-current-flowing-in-the-circuit">this one</a>, it is okay to use a battery that can supply more current than needed by your circuit. Due to Ohm's Law,
<span class="math-container">$$I = \frac VR$$</span>
the current <span class="math-container">$(I)$</span> that flows through a circuit is equal to voltage <span class="math-container">$(V)$</span> divided by resistance <span class="math-container">$(R)$</span>.</p>
<p>If your drone remains the same, it will have the same resistance. And if your battery of increased size is still 3.7V, Ohm's law states that the current going through will remain the same.</p>
<p>Because the current is the same, your drone will function just like it did before, and will not fry.</p>

CC BY-SA 4.0
2021-10-15T05:10:36.150Z
Thanks for such a nice answer. Had totally forgotten the equation. Now it makes so much sense
Raster R
CC BY-SA 4.0
2021-10-15T13:02:32.363Z
Just to round out the answer. You will get more flight time due to extra power capacity, but not double due to the extra weight.
Kevin
CC BY-SA 4.0
2021-10-15T04:33:51.513Z
2021-10-15T04:33:51.513Z
Jacob B
<p>Putting LiPo batteries in parallel is fine so long as they all begin at a similar charge voltage. Read more about it in my answer here: <a href="https://drones.stackexchange.com/a/2148/3712">How can I safely parallel charge my LiPo batteries?</a></p>
<p>When you put two equal batteries in parallel, their capacity doubles, their combined internal equivalent series resistance (ESR) gets cut in half, and their <em>max current capability</em> doubles, NOT their max current. In other words, since the ESR is cut in half, the <em>ability</em> to deliver current doubles, but that doesn't mean the current will double. The load will draw wha the load draws based on <code>V = IR --&gt; I = V/R</code>.</p>

CC BY-SA 4.0
2021-11-11T07:08:13.780Z
2021-11-11T07:08:13.780Z
Gabriel Staples
<p>Will connecting 2 lipo batteries of 3.7 V of 1500 mAh in parallel for a power source to a drone fry it? I understand the voltage will continue to be 3.7 V because it's in parallel. The current or Amps is expected to double. Is this doubling just in capacity, and will the current or Amps pulled just be as needed by the motors and controller - same as before? Or will the drone fry?</p>
<p>Let's say the weight of the battery here is not an issue at all.</p>
<p>R</p>

<lipo-batteries><batteries><building><comparison><toy-grade-drone>
Will wiring two batteries in parallel fry my drone?
Raster R
# Will wiring two batteries in parallel fry my drone?

(Asked by: username_0 on 2021-10-15)

Will connecting 2 lipo batteries of 3.7 V of 1500 mAh in parallel for a power source to a drone fry it? I understand the voltage will continue to be 3.7 V because it's in parallel. The current or Amps is expected to double. Is this doubling just in capacity, and will the current or Amps pulled just be as needed by the motors and controller - same as before? Or will the drone fry?

Let's say the weight of the battery here is not an issue at all.

R

**Tags:** lipo-batteries, batteries, building, comparison, toy-grade-drone


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## 2 answers

### Answer by username_1 on 2021-10-15. Score: 2

**TLDR; The drone will work the same**

Given that weight is not an issue here (which might be the biggest concern in the real world), the only things we need to take into account are voltage and current.

As you can find in this [question](https://electronics.stackexchange.com/questions/175222/is-it-really-ok-to-supply-more-current-than-what-the-component-is-rated-for/175234) and [this one](https://electronics.stackexchange.com/questions/352619/does-the-battery-determines-the-amount-of-current-flowing-in-the-circuit), it is okay to use a battery that can supply more current than needed by your circuit. Due to Ohm's Law,
$$I = \frac VR$$
the current $(I)$ that flows through a circuit is equal to voltage $(V)$ divided by resistance $(R)$.

If your drone remains the same, it will have the same resistance. And if your battery of increased size is still 3.7V, Ohm's law states that the current going through will remain the same.

Because the current is the same, your drone will function just like it did before, and will not fry.

> **Comments:**
> **username_0**: Thanks for such a nice answer. Had totally forgotten the equation. Now it makes so much sense  
> **username_2**: Just to round out the answer. You will get more flight time due to extra power capacity, but not double due to the extra weight.  

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### Answer by username_3 on 2021-11-11. Score: 0

Putting LiPo batteries in parallel is fine so long as they all begin at a similar charge voltage. Read more about it in my answer here: [How can I safely parallel charge my LiPo batteries?](https://drones.stackexchange.com/a/2148/3712)

When you put two equal batteries in parallel, their capacity doubles, their combined internal equivalent series resistance (ESR) gets cut in half, and their *max current capability* doubles, NOT their max current. In other words, since the ESR is cut in half, the *ability* to deliver current doubles, but that doesn't mean the current will double. The load will draw wha the load draws based on `V = IR --> I = V/R`.


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