Some accumulators accept energy at a low rate (low power) over a long time interval and deliver the energy at a high rate (high power) over a short time interval.
Some accumulators typically accept and release energy at comparable rates.
In general usage in an electrical context, the word accumulator normally refers to a lead–acid battery.
The original raising mechanism was powered by pressurised water stored in several hydraulic accumulators.
[1] In 1974, the original operating mechanism was largely replaced by a new electro-hydraulic drive system.