--- title: Ultralife Blog | Subsea Battery Insight description: Subsea Battery Insight | Battery & Charger design and manufacturing --- [![Ultralife-Blog](https://blog.ultralifecorporation.com/hs-fs/hubfs/Ultralife-Blog.png?width=500&height=67&name=Ultralife-Blog.png "Ultralife-Blog")](https://www.ultralifecorporation.com/) - [Contact Us](https://ecommerce.ultralifecorporation.com/contact) [![Learn More](https://no-cache.hubspot.com/cta/default/588756/interactive-192347389848.png)](https://blog.ultralifecorporation.com/hs/cta/wi/redirect?encryptedPayload=AVxigLLI5XFlS%2FVdV4llZYx7VNMpiTSCTXAZgpFKck0u1jHyhmeNpMg5xrPLAkmleukp%2B1VHnLQPEdsR3Fwa4q2ec13DcBYqqdkK2198PTgMMq7CjclZlBLzaxva3sBrSoZs3YlYmkD9lmU70AFe2bLp0599K%2FoxBldETf657EUKUPsrdTWIY2OCIw%3D%3D&webInteractiveContentId=192347389848&portalId=588756) # Get the latest from Ultralife [![](https://blog.ultralifecorporation.com/hubfs/Batteries-for-use-under-water.jpg)](https://blog.ultralifecorporation.com/blog/batteries-and-subsea-water) ## ["Batteries & Subsea Water DO NOT MIX - right?"](https://blog.ultralifecorporation.com/blog/batteries-and-subsea-water) \[fa icon="calendar"\] Jun 12, 2024 8:17:16 AM  | posted in [Subsea Battery Insight](https://blog.ultralifecorporation.com/blog/topic/subsea-battery-insight) [\[fa icon="comment"\] 0 Comments](https://blog.ultralifecorporation.com/blog/batteries-and-subsea-water#comments-listing) Many subsea engineers accustomed to mechanical hydraulics and/or tethered umbilicals have a concern that "You Cannot Reliably Use Batteries Under Water", so convincing them otherwise is a daily task for battery manufacturer Southwest Electronic Energy (SWE).  The company manufacture five standard SeaSafe® battery packs that can be used at an ocean depth of over 6,000m. 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