If you prefer to watch the guide in video form, here is a ~5 min video explaining it all in details. If you just want to read the guide in text format, please scroll down to the next section.

Battery Assault's basics:

• Remains active even if Clockwerk is disabled
  
• Hits a total of 16 times
  
• The damage scales extremely well: 240/560/880/1200 magic dmg in total
  
• Does not hit invisible units, but hits units in the fog of war (you can actually see where they are by paying attention to the shrapnel)
  
• Blocked by BKB, but not by Linken Sphere

Ministun lasts for 0.1 sec and procs every 0.7 sec, which means any hero that has more than 0.6 sec cast animation cannot use spells if caught alone with Clock. These heroes are (cast animation):

• Bloodseeker (0.6 sec) - Bloodrage & Rupture
  
• Earthshaker (0.69 sec) - Fissure & Enchant Totem (Echo Slam has no cast time)
  
• Jakiro (0.65 sec) - Dual Breath, Ice Path & Macropyre
  
• Leshrac (0.7 sec) - Split Earth & Lightning Storm (Diabolic Edict only has 0.5 sec cast time and Pulse Nova has no cast time)
  
• Luna (0.6 sec) - Lucent Beam & Eclipse
  
• Naga Siren (0.65 sec) - Mirror Image, Ensnare & Song of the Siren (Rip Tide has no cast time)
  
• Shadow Fiend (0.67 sec) - Shadowraze & Requiem of Souls
  
• Ogre Magi (0.56 sec) - Fireblast, Ignite, Bloodlust & Unrefined Fireblast (Aghanim upgrade). This is a bug in Dota 2 as Ogre Magi is able to cast spells under Battery Assault in Dota 1

Careful: if Rubick steals any of the previous spells, he will still be able to use them under Battery Assault because Rubick only has 0.1 sec cast animation. However, he won't be able to use the spells in the next list.

Battery Assault also prevents any spell with long cast time:

• Sniper's Assassinate (1.7 sec)
  
• Nature's Prophet Teleportation (3 sec)
  
• Meepo's Poof (1.5 sec)
  
• Spirit Breaker's Nether Strike (1.2 sec)
  
• Shadow Fiend's Requiem of Souls (1 sec)

Power Cog's basics:

• Cogs give no gold when destroyed
  
• Enemies who get zapped are stunned during 0.84 sec and knocked back 252 units at a speed of 300 units
  
• Units will destroy trees in 100 AoE around them while getting pushed back
  
• Only works on units with mana, which includes many neutral creeps
  
• Does not work on magic immune units & Roshan
  
• Deals magic damage to Health (reduced by magic resistance) but pure damage to Mana (can't be reduced)
  
• Can still zap under Chronosphere

Clockwerk can miss when attacking his own cogs if affected by a blind-type debuff:

• Brewmaster - Drunken Haze
  
• Broodmother - Incapacitating Bite
  
• Keeper of the Light - Blinding Light
  
• Night Stalker - Crippling Fear
  
• Riki - Smoke Screen
  
• Tinker - Laser
  
• Troll Warlord (Melee) - Whirling Axes

Cogs give vision like regular units (not flying vision):

• The vision range is approximately ~1700 / ~600 (day/night)
  
• Allows emergency check on Rosh / through cliffs and trees if Rocket Flare is on cooldown (plus the vision range during the day is huge) by hugging the ledge / the tree line

Cogs knock back ignores terrain & spells:

• You can easily trap enemies by pushing them on cliffs around Roshan / runes
  
• Be careful not to push enemies outside of an allied Kinetic Field or Chronosphere

Moving through cogs:

• Movement spells (Blink, Rolling Boulder, Geomagnetic Grip, Leap...) ignore cogs zap
  
• Force Staff does not ignore cogs zap (you can still push yourself outside of the cogs if you're trapped in, but you will be zapped in the process)
  
• Units ignoring pathing can move through the cogs (Spectre's Dagger, Broodmother's Web). They will still be zapped

Rocket Flare's basics:

• Does not kill enemy animal couriers
  
• Gives vision in a 600 radius
  
• The flare travels at a speed of 1500

Vision & Camp Blocking:

• Flare gives vision as it flies, allowing you to scout more than the intended area
  
• Flare counts as a unit, you can block creep spawn if you get the right timing (aim further than the creep camp to have your flare fly past at the right moment)

Hookshot's basics:

• Magic immunity will block damage, but not the latch or stun
  
• Allied units will not get disabled or damaged
  
• The hook travels at a speed of 4000/5000/6000
  
• Colliding with a neutral creep will stop the hook for no effect
  
• Clockwerk is silenced while travelling

Hookshot's advanced information:

• Hookshot actually stuns/damage in a small area. If you hook an ally that is hugging an enemy, he will still be stunned/damaged. It also stuns/damage enemies along the way
  
• Hookshot stuns when latching, but only damages when/if Clock arrives
  
• Hookshot goes through Siege units as if they didn't exist
  
• If Hookshot hits a target on the other side of a Chronosphere, Clock will be stuck the edge of Chronosphere like a pancake to a wall. Take that, Clockwerk

Clock is not invincible while flying:

• He will still be damaged if he goes through Wall of Replica (and an illusion of him will be created)
  
• He can be pulled away while flying. Pudge's hook, troll Earth Spirit's Grip, Dark Seer's Vacuum or even Force Staff can all stop him from reaching destination

Stopping Clock's Hookshot with Force Staff is actually easy to do if you have vision of him before he hooks an ally:

• Use Force Staff on Clock (while he's far away), and when he flies by you to reach your ally you will automatically Force Staff him and break his ultimate
  
• Doesn't work if you're the one being targeted as you will be stunned as soon as the Grapple hits

Why do you make this series in video form instead of written guide?

The simple answer is: Visual confirmation. Everyone can write stuff down, but that doesn't mean it's accurate - I want to give visual proof of everything I say. For instance, before making this video Dota 2 Wiki stated that Battery Assault's ministun lasted for 0.2 sec. After testing and bringing it to the dev forum , that value happened to be wrong and the wiki was changed.

This also allows me to bring various bugs to light while making the video, such as the fact that Ogre Magi should be able to cast spells under Battery Assault in Dota 2. What happened afterwards was that people started testing the cast time of different heroes in the dev forum, and realized that heroes in Dota 2 had slower cast/attack time than intended.

Any other guides?

You can find all my latest Steam Guides here. Here is a list of old Advanced Mechanics videos:

• Mirarana (Steam Guide / Youtube)
  
• Earth Spirit (Youtube / Update needed). Patch 6.79.
  
• Rubick (Youtube). Patch 6.77
  
• Morphling (Youtube). Patch 6.76.
  
• Brewmaster (Youtube). Patch 6.74.
  
• Faceless Void (Youtube). Patch 6.74.

Can I help in any way?

Sure you can! The obvious ways to help is the usual subscribe/like on Youtube/Facebook[www.facebook.com] /Twitter , but you can help me decide which hero you really want to see next as well as help asking the right questions so I can test it out.