Hi. You should check out and read these specific Topics about getting your Connectivity fixed and/or making it better:
https://help.tankionline.com/en/knowledge-bases/7/articles/2297-i-cant-enter-the-game-the-game-doesnt-load
https://help.tankionline.com/en/knowledge-bases/7/articles/2350-lost-server-connection
https://help.tankionline.com/en/knowledge-bases/7/articles/2363-connection-failed
https://help.tankionline.com/en/knowledge-bases/7/articles/2361-how-to-reduce-lags
You can also incorporate these items into your device to make the gameplay cleaner:
https://help.tankionline.com/en/knowledge-bases/7/articles/21361-how-to-get-rid-of-malware
https://help.tankionline.com/en/knowledge-bases/7/articles/44519-how-to-clean-tanki-online-clients-cache
https://help.tankionline.com/en/knowledge-bases/7/articles/60073-how-to-raise-fps-on-the-new-html5-version
https://help.tankionline.com/en/knowledge-bases/7/articles/2329-how-to-clear-your-browsers-cache
Your device may even be too warm to run. You can also turn off your device and wait a couple hours or so before going back to play.
I hope some of the above topics help your device run better!

Armadillo Module gives 50% resist to Critical.
Thunder Module gives 50% resist to Thunder. (both at max upgrade)
 
Thunder regular damage does 880 base, and 440 with Thunder Protection.
If Thunder does critical, it will always do 880 damage, whether or not it's close to the enemy or far away.
If you have Armadillo Protection and Thunder does Critical, Armadillo will reduce the Critical damage of Thunder from 880 to 440.
 
Critical damage and regular damage are separate things.
So they won't stack on each other.
The enemy with Armadillo Module and Thunder Protection will take 440 regular damage, and 440 from Critical. It's not 220 damage because they're separate.

So, this is the link to the latest Question of the Week submission:
https://docs.google.com/forms/d/e/1FAIpQLScdfh34YJ72pCo6SHrr5iNkH1w3Ww-VLpBMF2Ddbonqc0rHvA/viewform
Steps:
We just pick the language we want to submit in (ex. English). (Pretty self-explanatory on the Google Form) Write your name exactly how it is in the game. Write the letter, number, or what the V-Log says to write as the answer (They can show A, B, C, D, ... or 1, 2, 3, 4, ... or other answers.) So you should watch the V-Log fully to get the entire question and the answer choices clearly. You can also watch the Question of the Week section again for more clarity. After writing in your answer, you click next. But you're not done. It will say Thank You on the next page. You then click Submit! Now you are done! Best of luck in getting the Question of the Week correct! It's all luck-based.
Even if you get the question right, you still need to get picked by a random name generator to win the prize(s).
But it doesn't hurt to participate, as you can get a few thousand Crystals, etc. Nothing to lose. 
You might have gotten the question right but weren't one of the winners, and that's why you might have asked about this matter of format. But it's just randomly generated. You'll win as you keep submitting and getting lucky. In the past, I have also gotten the question right, but did not get picked as the winner.

Is your connection good now? Is it working now?
You can check out the Tanki Help Site to see which specific problem you may still have:
https://help.tankionline.com/knowledge-bases/7-knowledge-base/categories/234-problems-and-solutions/articles
The topic below looks like it can solve your server problem, if not already done so:
https://help.tankionline.com/en/knowledge-bases/7/articles/2297-i-cant-enter-the-game-the-game-doesnt-load

No, I think that since the Battle Pass is in the "Challenges" section, it will still be 500 Tankoins.
But maybe the Battle Pass offer in the Shop could be on a Discounted value. If not, it will still be $7.00 I believe.
 
Also, I think I read, in another Topic, that Marcus changed "50% on Everything" into "50% on Almost Everything".

So you would like to know when we will have more Discounts/Sales on Supplies?
 
If so, then we could maybe have another Ultra Weekend this next Saturday/Sunday, that can give 25% off of Supplies. (We get Ultra Weekends often, so you can get Supplies, etc. off, during these times.)
But if not, then Tanki's Birthday will hopefully have them. It can be up to 50% off on Supplies!
 
Tanki's Birthday is on June 4th. So save up your Crystals until then.

The actual numbers of the percent drop, of each rarity, is hidden by the developers. I don't think any tanker/Helper knows it.
 
But I do have something that may help:
After months, I saved up and opened 315 Containers, just recently.
I got around 15 Epic drops. I think I got 2 Legendary openings.  I got ONE Exotic from all those Containers. The rest were all Common, Uncommon, and Rare. So if you have 300 Containers to open, then I'm estimating that there is:
less than 5% chance of getting an Epic drop about 0.6% chance of a Legendary drop about 0.3% chance of getting an Exotic drop

In the official post,
it says,
21.03 Grand finals
So after the Grand finals, you'll start receiving notifications of rewards, and when they will be distributed.

You can check the rotation speed (degrees per second) of each Turret on the Wiki: https://en.tankiwiki.com/Turrets
They all have different speeds according to the one you're using.
 
If you want to increase the rotation speed of your turret, then you should use the Speed Boost supply that you have (Yellow Nitro supply).
It will increase your Hull speed by 40% and also the rotation speed by the same amount.
This is what it says on the Tanki Wiki on Supplies:
Increases speed of your tank by 40% for 30 seconds. Also increases rotation speed of your turret for 30 seconds.   The supply item, after activation temporarily increases the speed of the tank and the rotation speed of its turret.
 
If you want information on the other supply effects, you can check this Wiki: https://en.tankiwiki.com/Supplies

So can you at least play Tanki Online in your opened browser? If so, that's at least a good thing.
 
In the past, I couldn't log in or even open the downloaded version of Tanki Online. I thought I lost my account, but here are some things I did:
On the computer (or whichever device you use), go into the Downloads section, plus any other sections that have "Tanki Online" related content. Delete all and anything you have downloaded about Tanki Online. This will clear up all the previous data, apps, and interfering information that you currently have on your device. After you know you have nothing in your Folders and device related to Tanki, just close your tabs, and refresh your device a couple times. Then, go to the Tanki Online website, and start downloading the game after you have an empty/clean/fresh folder. This might also help with your performance and download.  
If you still cannot open your game after trying this, put some images so we can see what you are seeing. Maybe we can help with that.
Also, you can see this page on the Tanki Help Site for some potential problems you may be seeing/having, plus other topics that are there: https://help.tankionline.com/en/knowledge-bases/7/articles/2297-i-cant-enter-the-game-the-game-doesnt-load

Don't forget.
It could also be that since we live in different time zones, and our internet, connectivity, and speed are a little different, we can experience a time when a tanker, living in an earlier time zone, does an extra 1 second time of damage no matter where you are.
 
Example:
(In this example below, the Isida is in an earlier time zone than you.)
The Isida tanker is attacking on its end of the computer, and then you go behind a wall. The Isida will attack for its last one second while you're getting behind the wall. But for you, you'll see that you're already behind the wall, and you get Isida damage taken, through the wall. This makes it seem like it's a lag. (different timings)
Does this make somewhat sense?
 
(But also, I agree that we should fix this kind of problem.)

Hi there!
Right now, Tanki Online has not released the "Gifts" section in HTML5.
We will get it implemented in the future, as this topic becomes a priority for the developers.
 
For now, no one can send or read any of the Gift messages, but you can try:
chatting in the Clan Chat Telling your Tanki friends to come communicate on the Forum making your own personal Discord chat with Google Hangout other forms of communication that you and your friends are comfortable with

The above answers are helpful for the main question of how to use the Drones.
 
Also, if you have Defender Drone equipped, and you pick up the Double Armor supply in the battlefield, this can also apply the extra effect, but will SAVE the 3 extra consumed Double Armor supplies.
So it's a good idea to collect the supplies in battle to save your own supplies.
I believe the same goes with Booster Drone, but I have not used this drone much.

When we buy drones, each one gives a kind of boost or helpful assist to the tanker.
If we buy the Drone with Crystals, we will be able to use this boost forever, without ever having to un-equip the Drone.
 
That's why Batteries are used as another factor: to limit the time of using the Drone. This way, not everyone is using a Drone always.
Even though we have the Drone, we now have to be able to use it by always having Batteries. If no Batteries, we can't use the boosts from the Drone, which is good sometimes (enemy doesn't use Drone) and bad other times (we can't use it).
 
Tanks don't need gas for the Hull, or ammunition for the Turret because then it would be impossible, from the start of the game, to progress!
We would need to buy in order to get these extra items, making it only possible for Buyers to play.
 
So we require Batteries for the Drone to get their temporary boost, but other things aren't needed.

Yes!
Daily Missions give 150 Stars x 14 days (length of Half-Month Challenge) = 2100 Stars
Weekly Missions give 450 Stars x 2 weeks = 900 Stars
2100 + 900 = 3000 Stars
 
Plus, you'll get extra Stars from doing Matchmaking Battles, Special Missions, and other opportunities.