Energy can be restored by natural way, with the passage of time, or once every 10 minutes with Energy drinks.
Natural way of restoration
|Health index||Energy||Time between refills||Total number of Energy per hour|
|1-5||7 E||10 min||42 E|
|6||8 E||10 min||48 E|
|7||9 E||10 min||54 E|
|8||10 E||10 min||60 E|
|9||11 E||10 min||66 E|
|10||12 E||10 min||72 E|
|11||16 E||10 min||96 E|
Radioactive contamination occurs in region when nuclear weapons are used in this or nearby regions. This greatly lowers the speed of natural Energy restoration. You can clear any region of contamination by navigation to the region page and using Antirad.
Notice: radioactive contamination of every region is a sum of its own contamination, caused by usage of nuclear weapons in this region, and an indirect, caused by usage of nuclear weapons in other nearby regions.
Besides natural way of energy restoration you can refill it by using Energy drinks, which you can create in Storage tab by spending gold. You can only use Energy drinks only once in 10 minutes. You will see a countdown after Energy refill.
Energy cost reduction
To lower your Energy costs in wars and work you should upgrade your Endurance perk. You can read about your perks here.
Every player can receive a Medal for war activity every hour and send troops to war at no Energy cost.