For a worst case scenario (full load) how much a “Lipo Battery 5000 mAh - 11.1 Volt - 50 C - 55.5Wh” will approximately last for Jetson AGX Xavier Developer kit, and will it be sufficient to work for one hour.
Regards
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If you’re using Max-N (which is the “unlimited power”) mode and are powering a number of USB and NVME peripherals, it can use 50 Watts. (Technically, I think it could use even more, especially if you plug in a separate PCI-Express card, but I’ve never done that.)
50 Watts for one hour is 50 Wh. A 55.5 Wh battery will last just over one hour at that load.
Of course, this assumes that the battery is actually as powerful as it states. In general, you will often want to add a little margin.
On the other hand, the AGX Xavier kit also has a number of specific-power modes – 10W, 15W, and 30W. Also, you might not have a bunch of additional peripherals plugged in. In those cases, the battery should very likely last for well more than an hour. You can do a lot with the 30W/4 cores mode, and the GPU/DLA units.
It also depends on what you’re doing. Right now, my unit is running some simple image processing from a stereo camera, and driving a HDMI LCD touchscreen, and it’s set to MAXN mode (but not maxing it out,) and it’s using about 1.6 Amps at 15.5 Volts, so about 25 Watts. Assuming your battery is what it says it is, it would last two hours for this workload.
Also, the Jetson AGX does like higher voltages in. If you don’t use SATA or PCI-Express with 12V requirements, I think it will run on less than 12 Volts, but I would highly recommend getting a 4S (14.8 V) LiPo battery instead of the 3S (11.1V) battery you’re currently describing. Having some margin is great!
Another thing to worry about is battery protection. Once a LiPo reaches the bottom of its charge curve (about 3.2V per cell,) you must disconnect load, or it will start discharging to the point where it destroys itself. Some batteries come with “protection circuits” built in, but the battery you list (speced at 50C discharge rate) is unlikely to have that, so you have to solve that some way yourself.
If you think “I will always watch the battery or never forget,” then you’re like me, and you will have to lose 3 separate batteries to forgetting or being pulled away before you smarten up.
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WOW WOW WOW
Thanks alot @snarky you gave me exactly all the information I need , answered all my question and in addition pointed an essential issue “Battery monitoring or protection circuit”.
Best wishes
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