Shields will give your ship an almost impenetrable forcefield. You will be virtually immortal for a short period. A timer will appear in the top right corner, counting down from 100% to zero. The percentage indicated the amount of damage that is absorbed by the forcefield. This means that whenever you green shields, you should try to take advantage of it as soon as you can. It's annoying to have shields and not being able to make use of them. Ofcourse, you could head for the nearest minefield, but that isn't going to do much good to your score. Do keep in mind that your weapons still draw energy from your reserves. Many people greened shields, and died soon after that because they kept firing at enemies like crazy and taking a few hits. Don't be one of them :) In Warzone games, shields are an alternative way for conquering an enemy base. One teammate stays near the base, while a couple of others go green for shields. When one teammate finaly gets shields, all players attach immediately to the one near the base. The guy with the shields will go first and take all the hits from enemy fire. The others simply follow right behind him, covering him with swarms of bullets. The guy in front will probably die, but his death is worth it : the team conquers the base and the flags within.