4 years of power upgrades completed on space station

The space station is now equipped with 24 lithium-ion batteries to store power collected by the solar panels.

from https://www.reviewjournal.com/news/science-and-technology/4-years-of-power-upgrades-completed-on-space-station-2271053/

from
https://calliduselctric.tumblr.com/post/641963611589312512

from https://bettyoverton.blogspot.com/2021/02/4-years-of-power-upgrades-completed-on.html

from
https://bettyoverton.tumblr.com/post/641963936518914048