Reddit mentions of Bluecell Black Medium Size Lipo Battery Guard Sleeve/Bag for Charge & Storage

Ok, I'll let others comment on the quality of your build list. However, after just going through my first build, I will give you a list of extra little things that you will probably need but haven't thought of yet because this is your first build. It's annoying to get all of your parts in just to realize that you're missing some battery connectors or you don't have a tiny hex screwdriver for some screws on your frame. You will probably need the following:

• Battery charger: you need a charger meant for LiPo batteries. A lot of people recommend the Turnigy Accucel-6 (it's what I've got). Note that this guy doesn't come with the AC adapter that plugs into your wall. Any simple 12V power supply will work. I use a 12V/1.5A adapter I found in a box that used to go to an old router, but you can power it with other things like a 12V lead acid battery or an old computer power supply.
  
• LiPo Charging Bag: I mean something like this. LiPos are known to ignite if over- or under-charged. I use one of these to charge and store my LiPos. I've heard of other people using things like old ammo boxes for storage. LiPos are fine when properly handled, but a simple LiPo bag could save your house if your charger malfunctions.
  
• Soldering iron: building a quad normally requires lots of soldering. You'll need one if you don't already have one. Most people recommend your soldering iron is at least 40W (the higher the wattage, the more heat it can produce). But I cheaped out with this 25W kit, and I haven't had any problems. If you don't get a kit, I would recommend getting some solder wick or a solder sucker so you can remove the solder if you mess up.
  
• Extra solder: it sucks to run out of solder in the middle of your build. You can pick up a couple of spools of 60/40 rosin core solder at RadioShack, and it will work just fine.
  
• Helping hands: this thing is great for holding things together while you try to solder them.
  
• Electronics screwdriver kit: you'll need a tiny screwdriver for screwing most things in your build. Not every screw is Phillips-head though, so get a kit that includes different sizes of hex and star bits too.
  
• Wire cutter/stripper: you will need this.
  
• Multimeter: you could get away without one of these, but they can give some peace of mind to know that you're not short-circuiting anything before you connect your battery and fry your flight controller.
  
• PDB: a power distribution board. This little thingy has solder pads all around it. The + pads are all connected together, and the – pads are all connected together. So you can wire your battery terminals to one + pad and one – pad, and all the other + pads will be 12V power and all the other – pads will be ground. These are useful for distributing 12V power to everything in your quad that needs it: each ESC, FPV camera, video Tx, voltage monitor on your FC, etc. The alternative to a PDB is a wiring harness, but I think those are kinda messy. That PDB link shows a 36mm PDB, the perfect size for the ZMR250 frame. (Side-note: the Crius FC you have in your list is 50mm x 50mm and is probably too big for the ZMR250 frame. I would recommend a 36mm FC like the Naze32).
  
• 18 gauge wire: it doesn't have to be 18 gauge, but that's a good medium size for most use cases on a quad. Use this for wiring a battery connector to your PDB among lots of other uses. Get both red and black.
  
• XT-60 connectors: these things. It's the same connector that is on the battery you listed. I would get a pack of both male and female connectors. You'll need one wired to your PDB to get power from your battery to your quad. I've also used these guys to power my FPV Rx and monitor with a separate battery.
  
• 3.5mm bullet connectors: these things can be soldered on to connect your motor leads to your ESCs. Some people prefer to solder their motors directly to their ESCs, but I like the bullet connector option in case you need to swap out a defective motor.
  
• Servo cables: depending on which FC and Rx you get, they may or may not come with servo cables. It might be a good idea to have 10 or so of these laying around. These things are used to connect your Rx to your flight controller, among other things.
  
• 5V buzzer: you might want a little 5V piezo buzzer connected to your FC to notify you of low battery voltage or to turn on with a switch on your Tx if you can't find your quad in high grass or something.
  
• Micro USB cable: a lot of flight controllers (like the Naze32 or the Crius) use a micro USB cable to connect to your computer for configuration. However, you are almost guaranteed that they won't come with one. You might already have one from an old cell phone charger, or you can pick one up at any electronics store. Notice that this is a micro USB and not a mini USB. Make sure you get the correct one, since a mini USB won't fit in the receptacle.
  
• Zip ties: get lots of them. Tie down your ESCs to the arms of your frame... tuck away wires so they don't get chopped up by your props... these things are used everywhere. I prefer black so they blend in with your black frame.
  
• Velcro: get some longs strips of adhesive-backed velcro. It's great for securing things to your quad that you take off often like your battery or your Mobius camera.
  
• Velcro battery strap: get some of these things for even more secure attachments of batteries and things.
  
• Heat shrink: used for insulating soldered connections. Get lots of this in a few different sizes.
  
• M3 sized screws, nuts, and standoffs: something like this is useful for securing your PDB and FC to your frame. I would get a nylon set, since nylon screws are a lot lighter than metal screws. Most of the holes on the ZMR250 frame are size M3, except for the motor holes. Those are M2, so you might want to get some M2 screws also just in case.
  
• Lanyard for your Tx: so you can hang your remote around your neck and pick up the pieces of your crashed quad with two hands.
  
• Eye protection: do yourself a favor and get some safety goggles to protect your eyes from dangerous things like hot solder and spinning blades of death.
  
  That's about all I can think of right now.

I charge batteries in a quality charger overnight while I'm asleep, but I do turn off the outlet strip my chargers are connected to when I leave the house, for the same reason I don't run the washing machine while I'm not home ... if something does go wrong I want to be here to deal with it before the damage gets worse.

Some people use a charging bag for an extra measure of safety, but I'm comfortable with a quality charger (like your Intellicharger).