I got one similar to that years ago, but it used a cable and pulleys to generate the resistance. I ended up not using it much as it didn't have much of a range of motion, which drove me nuts.
Not sure if I ever managed to use it for longer than 5-10 minutes at a time, so I have no idea how long it lasts. XD
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Not sure if I ever managed to use it for longer than 5-10 minutes at a time, so I have no idea how long it lasts. XD