Yes, we actually have a corner of the house dedicated to just keeping various items charged and running for when the power goes off.
So far in 2023 we haven't had a single day without loadshedding, and recently we seem to have graduated from mostly being in Stages 1 & 2 to mostly being in Stages 5 & 6 which often means we get to enjoy four hours of uninterrupted blackouts at a time.