Answers.Body: <p>Don't ever put power-banks in series or paralel !!! They are not plain batteries.</p>
  <p>Unless you are an electrical engineer that understands the exact circuitry inside the power-banks this is in general NOT safe.<br />
  Wiring multiple power-banks together can lead to serious problems. Like premature wear on the power-banks or even damaging them completely (as in &quot;overheating until they catch fire&quot;).</p>
  <p>And, in this case you don't need to as David already said in his answer. One should suffice.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-04-21T10:59:30.497Z
Answers.LastActivityDate: 2021-04-21T10:59:30.497Z
Answers.UserDisplayName: Tonny
Answers.Body: <p>Yes. The EV3 technically only needs 5V to run. And just the EV3 by itself pulls around 200mA at that voltage. However, motors could be a problem. They can pull up to 1A when stalled, which could overload the power supply. Without knowing the technical specifications of the actual power supply, it is hard to say what it is actually capable of.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-04-20T23:47:48.993Z
Answers.Text: Aren't there some typical values for power banks? Even [the cheapest ones](https://www.proshop.dk/Powerbank/Sandberg-Saver-Powerbank-20000-Powerbank-Sort/2801915) seem to be able to deliver at least 2.5 A.
Answers.UserDisplayName: Peter Mortensen
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-04-20T17:30:50.707Z
Answers.LastActivityDate: 2021-04-20T17:30:50.707Z
Answers.UserDisplayName: David Lechner
Body: <p>I have two USB power banks that according to USB standard supply 5 V. I want to power my EV3 brick using my two USB power banks wired in series and to the EV3 battery slot.</p>
  <p>Can I power supply an EV3 hub through the battery slot with 10 V?</p>
  
Tags: <ev3><battery>
Title: Is it possible to power supply an EV3 hub through the battery slot with 10 V?
UserDisplayName: amreo
ThreadText: # Is it possible to power supply an EV3 hub through the battery slot with 10 V?
  
  (Asked by: username_0 on 2021-04-20)
  
  I have two USB power banks that according to USB standard supply 5 V. I want to power my EV3 brick using my two USB power banks wired in series and to the EV3 battery slot.
  
  Can I power supply an EV3 hub through the battery slot with 10 V?
  
  **Tags:** ev3, battery
  
  
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  ## 2 answers
  
  ### Answer by username_1 on 2021-04-21. Score: 2 | Accepted answer
  
  Don't ever put power-banks in series or paralel !!! They are not plain batteries.
  
  Unless you are an electrical engineer that understands the exact circuitry inside the power-banks this is in general NOT safe.  
  Wiring multiple power-banks together can lead to serious problems. Like premature wear on the power-banks or even damaging them completely (as in "overheating until they catch fire").
  
  And, in this case you don't need to as username_2 already said in his answer. One should suffice.
  
  
  ---
  
  ### Answer by username_2 on 2021-04-20. Score: 4
  
  Yes. The EV3 technically only needs 5V to run. And just the EV3 by itself pulls around 200mA at that voltage. However, motors could be a problem. They can pull up to 1A when stalled, which could overload the power supply. Without knowing the technical specifications of the actual power supply, it is hard to say what it is actually capable of.
  
  > **Comments:**
  > **username_3**: Aren't there some typical values for power banks? Even [the cheapest ones](https://www.proshop.dk/Powerbank/Sandberg-Saver-Powerbank-20000-Powerbank-Sort/2801915) seem to be able to deliver at least 2.5 A.  
  
  ---
  
  