Shield cell banks can be a great way for your ship to be protected from feedback cascade experiments. There are three main stages to shield cell activation and usage. Boot-up speed is only important for pilots who are concerned about power, while spin-up time is how fast a shield cell takes to “charge” or “activate.”
Shield cell banks restore a specific amount of MJ to your shields when they are down, but only for a short time. Using a shield cell bank in this situation is a great way to get your shield recharge rate up when you’re down and need to make a last-second decision. It is not an immediate solution, so be aware of the lag. Shield cell banks are best used on ships with high MJ shields.