Sweden switches on largest battery energy storage system in the Nordics - Energy Storage

Sweden's largest energy storage investment, totaling 211 MW, goes live, combining 14 sites.

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This looks exactly like I always imagined battery storage should look like, at least in a first step. Mid-sized batteries strategically distributed in the grid for frequency regulation/grid balancing.
I hate mixing W with Wh.

Is it 211 MWh battery storage with maximum power output (peak, average, etc.) of 211 MW?
- It very much looks like it is 211MW lasting for 1h giving 211MWh.
- It literally says in first paragraph "...in Sweden to deploy 211 MW / 211 MWh..."
  
  = 1 h
  
  It's not a strictly technical megazine. That's why I have doubts.
- There is usually a 1:1 between MW:MWh at these capacities.
Sadly no info whatsoever on batteries.
- I found this on it; still need to read through it. Some sort of lithium battery technology, it seems.
  
  I don't know specifics on this battery farm, but almost all are essentially fleets of shipping containers filled with smaller batteries, rather than some super-cool-mega-battery, so it's probably a safe assumption that this is a landmark project in scale, rather than in technology specifics.
  
  Li-Ion seems to be the go-to solution. I hope new static energy storage projects will prefer other options (Na-Ion, flow batteries, ..) since there's a limited supply of Lithium and we need it for vehicles.

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