# Modified BR2 with 6 batteries

**URL:** <https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364>\
**Category:** Build/Make\
**Created:** [November 16, 2019, 3:59am UTC](https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364 "2019-11-16T03:59:42Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![gcelec](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/gcelec/32/2038_2.png) [@gcelec](https://discuss.bluerobotics.com/u/gcelec)\
**Post date:** [November 16, 2019, 3:59am UTC](https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364/1 "2019-11-16T03:59:42Z")

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Fiber BR2 with 6 batteries, forward Ping360 sonar, aft Imagenex 881a profiling sonar, SeaView SVS-109 multiplexer with 8 serial channels, 2 ethernet ports, 3 SD video channels and 2 ttl channels.

 ![IMG_20191115_162437671](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/3/31d2d43d6423a27409d7069e2ca9bff824f2e4e3.jpeg)

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**Author:** ![kaosrulz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/kaosrulz/32/1008_2.png) [@kaosrulz](https://discuss.bluerobotics.com/u/kaosrulz)\
**Post date:** [November 16, 2019, 7:19pm UTC](https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364/2 "2019-11-16T19:19:25Z")

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Now that’s a clever bit of tech. Any specific use that it has been built 4?

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**Author:** ![gcelec](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/gcelec/32/2038_2.png) [@gcelec](https://discuss.bluerobotics.com/u/gcelec)\
**Post date:** [November 17, 2019, 5:18pm UTC](https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364/3 "2019-11-17T17:18:41Z")

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Thanks I put it together to do pipe and tunnel inspections. The multiplexer is overkill, but it’s nice to have plenty of options.

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**Author:** ![dtrail](https://avatars.discourse-cdn.com/v4/letter/d/d6d6ee/32.png) [@dtrail](https://discuss.bluerobotics.com/u/dtrail)\
**Post date:** [November 20, 2019, 9:19pm UTC](https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364/4 "2019-11-20T21:19:31Z")

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Pretty cool. Is this fiber only umbilical? Does it have any vertical thrusters?

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**Author:** ![gcelec](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/gcelec/32/2038_2.png) [@gcelec](https://discuss.bluerobotics.com/u/gcelec)\
**Post date:** [November 20, 2019, 9:38pm UTC](https://discuss.bluerobotics.com/t/modified-br2-with-6-batteries/6364/5 "2019-11-20T21:38:21Z")

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Yes it’s fiber only and has two vertical thrusters.  
I’ve been testing it with good results - over 40,000 mAh draws the batteries down about 1 volt. I think the batteries last longer because the load is shared between them all even with an hour of 40 amp draw and intermittent 100 amp draws.

 ![IMG_20191118_190933329.jpg](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/b/b148ab2e2c9ace77b22e757d21eec245df3d6c03.jpeg)