Hi Clashers! I was not going to make a post about this, but, surprisingly, it is the question I have gotten the most! Here is all of the information you need to know about your laboratory!
The best advice I can give you is to always have a troop in the lab upgrading, this will help immensely when you start to upgrade your town hall. To upgrade your troops, click on your laboratory and click which troop you would like to upgrade. When the upgrade is complete, all of the troops you currently have in your camps will be upgraded as well. The training costs rise the more you upgrade your troops.
You can build your laboratory when your Town Hall is at level 3. The initial build of your lab costs $25k elixir. With a level 1 lab you can upgrade your archers, barbarians, and goblins to level 2. Each of these troop upgrades costs $50k per troop type.
Lab 2: You can build a level 2 lab when your TH is at level 4. Upgrading your lab to level 2 costs $50k elixir. With a level 2 lab you can upgrade your giants, balloons, and wallbreakers to level 2. Each of these troop upgrades costs $100k per troop type.
Lab 3: You can build a level 3 lab when your TH is at level 5. Upgrading your lab to level 3 costs $90k elixir. With a level 3 lab you can upgrade your archers, barbarians, and goblins to level 3. You can upgrade wizards to level 2. Upgrading your wizards and barbarians costs $150k elixir. Upgrading your archers and goblins will cost $250k elixir per troop type.
Lab 4: You can build a level 4 lab when your TH is at level 6. Upgrading your lab to level 4 costs $270k elixir. With a level 4 lab you can upgrade your giants, wallbreakers, wizards, and balloons to level 3. Giants and wallbreakers cost $250k. Wizards and balloons cost $450k elixir.
Lab 5: You can build a level 5 lab when your TH is at level 7. Upgrading your lab to level 5 costs $540k elixir. With a level 5 lab you can upgrade your wizards, giants, wallbreakers, balloons, archers, barbarians, and goblins to level 4. You can upgrade your healers, dragons, and PEKKAs to level 2. Barbarians cost $500k to upgrade. Archers, goblins, giants, healers, and wallbreakers cost $750k elixir per troop type. Balloons and wizards cost $1,350,000. Dragons cost $2 million and PEKKAs cost $3 million.
Lab 6: You can build a level 6 lab when your TH is at level 8. Upgrading your lab to level 6 costs $1,080,000 elixir. With a level 6 lab you can upgrade your archers, giants, goblins, wallbreakers, barbarians, goblins, and balloons to level 5. You can upgrade healers, dragons, and PEKKAs to level 3. These upgrades range in cost from 2.25 million to 6 million.
Lab 7: You can build a level 7 lab when your TH is at level 9. Upgrading your lab to level 7 costs $3 million elixir. With a level 7 lab you can upgrade your archers, giants, balloons, and barbarians to level 6. Barbarians, balloons, and giants cost $6 million and archers cost $7.5 million. All updates for this level take 14 days.
Clash of Clans Strategy 