what would you make with 20 laptop batteries??

At work we have laptop batteries that were going to be recycled because we no long have that kind of laptop. They are 11.1v li ion, 7.2Ah batteries. What would you make?? I need to put them on our conditioner and figure out which are good but my guess is at least 20 should be fine.

What would you make??

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Probably nothing.

But I'd definity keep a couple for a rainy day.