# Yet another question about T200 and current

**URL:** <https://discuss.bluerobotics.com/t/yet-another-question-about-t200-and-current/9471>\
**Category:** General Discussion\
**Created:** [April 16, 2021, 2:08pm UTC](https://discuss.bluerobotics.com/t/yet-another-question-about-t200-and-current/9471 "2021-04-16T14:08:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Charles](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/charles/32/7214_2.png) [@Charles](https://discuss.bluerobotics.com/u/Charles)\
**Post date:** [April 16, 2021, 2:08pm UTC](https://discuss.bluerobotics.com/t/yet-another-question-about-t200-and-current/9471/1 "2021-04-16T14:08:50Z")

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If a device need 5amp to work for 1 hour and the battery is 25amp. We assume the setup will work for about 5 hours and then there will be no more energy in the battery.

If we do the same thing with T200 and BR batterie and do this in a conservative way, I reach very low running time. See: If I have 6x T200 running at only 3A out of the 16-20A full throttle figure (thus about 20% max speed), the 6x T200 would need 18A total. With the BR battery, this is 1 hour or run time.

Is this what the users experience? With 8 thrusters, the heavy configuration would then last only 45 min. Where do math and user reality meets up?

thank you

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**Author:** ![etienne](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/etienne/32/1942_2.png) [@etienne](https://discuss.bluerobotics.com/u/etienne)\
**Post date:** [April 17, 2021, 12:47pm UTC](https://discuss.bluerobotics.com/t/yet-another-question-about-t200-and-current/9471/2 "2021-04-17T12:47:30Z")

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Hello,

Battery life will depend on diving conditions, what you do with the ROV etc.

For example, when doing fresh water tank survey, the ROV would last me 2.5 hours+

When I did offshore inspections with it, 30-45 minutes.

This is why surface supply is the way to go if you will be using this machine commercially.

Cheers,  
E.

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<div class="post-metadata">

**Author:** ![Charles](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/charles/32/7214_2.png) [@Charles](https://discuss.bluerobotics.com/u/Charles)\
**Post date:** [April 18, 2021, 2:49pm UTC](https://discuss.bluerobotics.com/t/yet-another-question-about-t200-and-current/9471/3 "2021-04-18T14:49:59Z")

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Interesting info. So I guess power calculation do work!

merci!