The energy shield - due to the lack of the version, known in POE Currency as Energy Shield - is just one of 3 sources that the character can use. It plays the role of a barrier - some (with a small exception, about which in the chapter) the damage received by the personality is stopped by him, and when he runs out, the character starts to get rid of health points.
The energy shield is visible as part. The fragment that is reddish is health points, light blue is the shield. The quantity of light colour depends on the ratio of health points - the more protect in relation to life, the larger the surface will consume.
The advantage of this energy shield compared to health is its regeneration rate - by default, 20% of this shield is restored in every second. This value can be further improved by passive skills and items, meaning it is able to regenerate quickly with no need for potions or other skills.
The quality that distinguishes it is the time necessary to start regeneration. Health points usually regenerate gradually, the defense takes 2 seconds, through. Without investing in any abilities to speed up regeneration, so you just need 7 seconds (two to begin and 5 to restore 100%) to replenish it from scratch.
The Amount of energy shield points can be increased in several ways:
Intelligence feature - for every 10 points, the character will get 2% extra defense (and 5 mana points). Passive abilities - a few of the skills on the ability tree that is passive allow you feature or to Buy POE Currency grow the Intelligence shield. Equipment - a number of items offer you a gain in the energy shield by a particular point value.