|Energy Storage Upgrade|
|Source Mod||IndustrialCraft 2|
An energy storage upgrade can be used to upgrade a machine's internal power storage. Place one or more energy storage upgrades into the four right-most slots to upgrade a machine. Each upgrade increases the storage capacity by 10,000 EU. Its main purpose is for use when a machine's energy consumption becomes too large for its internal storage to handle; this only happens when an extreme number of Overclocker Upgrades are present.
Besides this, it does not seem to have any effect on current machines.