Answers.Body: <p>This is what the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb1142c01" rel="nofollow noreferrer">45678</a> user guide says:</p>
  <blockquote>
  <p>EN</p>
  <p>Important information: Only use a high-quality Power Adaptor, PC or
  Laptop for charging the rechargeable battery. Output 5V DC,
  500-1500mA. Use the supplied LEGO® USB cable. How to charge the
  battery: Charge the battery fully the first time it is used. The
  battery can be charged when inserted in the TECHNIC Large Hub. Connect
  the LEGO USB cable to a power source. The Charging Light will turn red
  when the power source is connected. The Charging Light will turn green
  when the battery is fully charged. Charging time for the battery is up
  to six hours. The TECHNIC Large Hub can be used during charging but
  this will increase the charging time. If the battery is fully
  discharged and the TECHNIC Large Hub cannot be turned on when the
  power source is connected, the battery will need up to one hour
  charging time before the TECHNIC Large Hub can be turned on. Warning!
  Do not dispose your battery by incineration. Dispose the battery in
  accordance with the current legislation in your country. Do not
  short-circuit the battery. Do not damage the battery. Do not dispose
  in fire. Never use a damaged battery.</p>
  </blockquote>
  <p>There is no information on how long the SPIKE hub can be connected and operating from an external DC power source.</p>
  <p>For your purpose, it may work or it may shutdown. It depends on whether the GBC module draws more current than the USB power source can supply.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-07-21T19:58:12.000Z
Answers.Text: @user253751, Only The Lego Group could provide a definitive answer to this question. Based on my experience designing consumer devices like the SPIKE hub that can be charged from a USB host or power brick it is impossible to say how such a device will behave. For example when the USB power source cannot support the load the battery will be discharged until the device shuts down. What the hub will do cannot be determined from the information in the OPs question.
Answers.UserDisplayName: Dan1138
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-01-31T08:37:26.367Z
Answers.Text: Considering LEGO explicitely supports this - emphasis on "The TECHNIC Large Hub can be used during charging but this will increase the charging time. ", I don't see why there would be any issues at all or why it would stop working. I usually keep it connected when using a static robot (like the rubik's cube solver) as it seems to provide more current for the motors; never had any problem.
Answers.UserDisplayName: Joubarc
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-07-09T01:20:03.117Z
Answers.LastActivityDate: 2024-07-19T11:39:03.983Z
Answers.LastEditDate: 2024-07-19T11:39:03.983Z
Answers.UserDisplayName: Dan1138
Body: <p>The hubs present in the Mindstorms Robot Inventor or SPIKE Prime sets have 2100mAh lithium-ion batteries which can be charged with the accompanied cable with a micro USB connector on one end and a regular USB connector on the other end. You need to provide your own USB charger and a high performant one such as the ones used with an Apple or Samsung device is recommended.</p>
  <p>My question is, during an exposition, e.g. when the hub is used in a GBC module, can you leave the cable connected so it will function as a continuous power supply? Or is this not recommended because it could mess up the charging cycles of the rechargeable batteries? Would the performance of the models stay constant?</p>
  
Tags: <electronics><robot-inventor><spike-prime><gbc>
Title: Continuous power supply for the SPIKE Prime or Robot Inventor hubs?
UserDisplayName: Michael Verschaeve
ThreadText: # Continuous power supply for the SPIKE Prime or Robot Inventor hubs?
  
  (Asked by: username_0 on 2021-07-07)
  
  The hubs present in the Mindstorms Robot Inventor or SPIKE Prime sets have 2100mAh lithium-ion batteries which can be charged with the accompanied cable with a micro USB connector on one end and a regular USB connector on the other end. You need to provide your own USB charger and a high performant one such as the ones used with an Apple or Samsung device is recommended.
  
  My question is, during an exposition, e.g. when the hub is used in a GBC module, can you leave the cable connected so it will function as a continuous power supply? Or is this not recommended because it could mess up the charging cycles of the rechargeable batteries? Would the performance of the models stay constant?
  
  **Tags:** electronics, robot-inventor, spike-prime, gbc
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2021-07-09. Score: 5
  
  This is what the [45678](https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb1142c01) user guide says:
  
  > EN
  >
  > Important information: Only use a high-quality Power Adaptor, PC or
  > Laptop for charging the rechargeable battery. Output 5V DC,
  > 500-1500mA. Use the supplied LEGO® USB cable. How to charge the
  > battery: Charge the battery fully the first time it is used. The
  > battery can be charged when inserted in the TECHNIC Large Hub. Connect
  > the LEGO USB cable to a power source. The Charging Light will turn red
  > when the power source is connected. The Charging Light will turn green
  > when the battery is fully charged. Charging time for the battery is up
  > to six hours. The TECHNIC Large Hub can be used during charging but
  > this will increase the charging time. If the battery is fully
  > discharged and the TECHNIC Large Hub cannot be turned on when the
  > power source is connected, the battery will need up to one hour
  > charging time before the TECHNIC Large Hub can be turned on. Warning!
  > Do not dispose your battery by incineration. Dispose the battery in
  > accordance with the current legislation in your country. Do not
  > short-circuit the battery. Do not damage the battery. Do not dispose
  > in fire. Never use a damaged battery.
  
  There is no information on how long the SPIKE hub can be connected and operating from an external DC power source.
  
  For your purpose, it may work or it may shutdown. It depends on whether the GBC module draws more current than the USB power source can supply.
  
  > **Comments:**
  > **username_1**: @user253751, Only The Lego Group could provide a definitive answer to this question. Based on my experience designing consumer devices like the SPIKE hub that can be charged from a USB host or power brick it is impossible to say how such a device will behave. For example when the USB power source cannot support the load the battery will be discharged until the device shuts down. What the hub will do cannot be determined from the information in the OPs question.  
  > **username_2**: Considering LEGO explicitely supports this - emphasis on "The TECHNIC Large Hub can be used during charging but this will increase the charging time. ", I don't see why there would be any issues at all or why it would stop working. I usually keep it connected when using a static robot (like the rubik's cube solver) as it seems to provide more current for the motors; never had any problem.  
  
  ---
  
  