Answers.Body: <p>This battery was glued when assembled, and it can only be opened destructively. The best way seems to be cutting with a knife around the seam to break all of the tabs that are glued in place.</p>
  <p>Here's how it looks with the top removed:</p>
  <p><a href="https://i.sstatic.net/nSCrNpfP.png" rel="noreferrer"><img src="https://i.sstatic.net/nSCrNpfP.png" alt="Battery with top removed" /></a></p>
  <p>The guts include two LiPo cells in series to give us the 7.3V nominal voltage.</p>
  <p><a href="https://i.sstatic.net/8bVjEVTK.png" rel="noreferrer"><img src="https://i.sstatic.net/8bVjEVTK.png" alt="LiPo cells" /></a></p>
  <p>The two cells are taped together with a charging circuit.</p>
  <p>We can see on the cells that they each have a 2.44Wh capacity at a nominal voltage of 3.65V:</p>
  <p><a href="https://i.sstatic.net/65lfqiNB.png" rel="noreferrer"><img src="https://i.sstatic.net/65lfqiNB.png" alt="Cell specs" /></a></p>
  <p>Here's a photo of the board with the connector:</p>
  <p><a href="https://i.sstatic.net/bgAJ1HUr.png" rel="noreferrer"><img src="https://i.sstatic.net/bgAJ1HUr.png" alt="Board top" /></a></p>
  <p>And the back of the board showing the protection circuitry and cell connection points:</p>
  <p><a href="https://i.sstatic.net/zOhER1J5.png" rel="noreferrer"><img src="https://i.sstatic.net/zOhER1J5.png" alt="Back of board" /></a></p>
  <p>There is some additional information about this battery in <a href="https://www.lego.com/cdn/cs/legal/assets/bltb6d5225639e90106/DGXNY20200624U01-1%EF%BC%88%E4%B8%9C%E8%8E%9E%E6%96%B0%E8%83%BD%E6%BA%90_LGOYU89_713030.pdf" rel="noreferrer">TLG's official test report</a>. That document includes a few photos of the components as well:</p>
  <p><a href="https://i.sstatic.net/A2YpWll8.png" rel="noreferrer"><img src="https://i.sstatic.net/A2YpWll8.png" alt="Cell photo from test document" /></a></p>
  <p>The <a href="https://www.lego.com/cdn/cs/legal/assets/blt0ed2534ac75c3afa/713030_MSDS_2024.pdf" rel="noreferrer">materials safety datasheet (MSDS)</a> may also be of interest. Both the testing document and the MSDS come from TLG's <a href="https://www.lego.com/en-us/legal/notices-and-policies/compliance/battery-documentation/?locale=en-us" rel="noreferrer">battery documentation</a>.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-09-02T19:30:10.150Z
Answers.LastActivityDate: 2024-09-03T11:22:55.230Z
Answers.LastEditDate: 2024-09-03T11:22:55.230Z
Answers.UserDisplayName: jncraton
Body: <p>What is inside the <a href="https://brickset.com/sets/45345-1/SPIKE-Essential-Set" rel="noreferrer">45345 SPIKE Essential</a> battery?</p>
  <p><a href="https://i.sstatic.net/nSBZLsiP.png" rel="noreferrer"><img src="https://i.sstatic.net/nSBZLsiP.png" alt="Battery photo" /></a></p>
  
Tags: <piece-information><electronics><powered-up>
Title: What is inside the SPIKE Essential battery?
UserDisplayName: jncraton
ThreadText: # What is inside the SPIKE Essential battery?
  
  (Asked by: username_0 on 2024-09-02)
  
  What is inside the [45345 SPIKE Essential](https://brickset.com/sets/45345-1/SPIKE-Essential-Set) battery?
  
  [![Battery photo](https://i.sstatic.net/nSBZLsiP.png)](https://i.sstatic.net/nSBZLsiP.png)
  
  **Tags:** piece-information, electronics, powered-up
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2024-09-02. Score: 8
  
  This battery was glued when assembled, and it can only be opened destructively. The best way seems to be cutting with a knife around the seam to break all of the tabs that are glued in place.
  
  Here's how it looks with the top removed:
  
  [![Battery with top removed](https://i.sstatic.net/nSCrNpfP.png)](https://i.sstatic.net/nSCrNpfP.png)
  
  The guts include two LiPo cells in series to give us the 7.3V nominal voltage.
  
  [![LiPo cells](https://i.sstatic.net/8bVjEVTK.png)](https://i.sstatic.net/8bVjEVTK.png)
  
  The two cells are taped together with a charging circuit.
  
  We can see on the cells that they each have a 2.44Wh capacity at a nominal voltage of 3.65V:
  
  [![Cell specs](https://i.sstatic.net/65lfqiNB.png)](https://i.sstatic.net/65lfqiNB.png)
  
  Here's a photo of the board with the connector:
  
  [![Board top](https://i.sstatic.net/bgAJ1HUr.png)](https://i.sstatic.net/bgAJ1HUr.png)
  
  And the back of the board showing the protection circuitry and cell connection points:
  
  [![Back of board](https://i.sstatic.net/zOhER1J5.png)](https://i.sstatic.net/zOhER1J5.png)
  
  There is some additional information about this battery in [TLG's official test report](https://www.lego.com/cdn/cs/legal/assets/bltb6d5225639e90106/DGXNY20200624U01-1%EF%BC%88%E4%B8%9C%E8%8E%9E%E6%96%B0%E8%83%BD%E6%BA%90_LGOYU89_713030.pdf). That document includes a few photos of the components as well:
  
  [![Cell photo from test document](https://i.sstatic.net/A2YpWll8.png)](https://i.sstatic.net/A2YpWll8.png)
  
  The [materials safety datasheet (MSDS)](https://www.lego.com/cdn/cs/legal/assets/blt0ed2534ac75c3afa/713030_MSDS_2024.pdf) may also be of interest. Both the testing document and the MSDS come from TLG's [battery documentation](https://www.lego.com/en-us/legal/notices-and-policies/compliance/battery-documentation/?locale=en-us).
  
  
  ---
  
  