FAQ UPDATED: 5 May 16 FAQ Q: My wraps shipped flat, with two creases. Is that going to be an issue? Should I panic? A: No. Q: How fast does the wrap shrink onto the batt? A: Almost instantly, once you apply heat. Remove from heat immediately, once the wrap looks pretty. Q: Does the wrap really shrink perfectly around the edges like that? A: Yes. It's awesome. Q: You say I need wrap with a length of 72 mm. What if I buy a roll of wrap? Do I need to cut it? A: You're an idiot. Q: How wide are the typical wraps? A: Shipped/flat width is 30 mm. Q: What if I lose my round insert/grommet thingy from the positive terminal? A: Cry. Or buy some insulators. Or make some insulators. Or don't lose your insulators in the first place. Q: Why do I need to write on the battery before I put the wrap on it? A: You don't. You can write on the outside of the wrap instead, but it might wear off. If you want to ask about pairing/marrying batteries, there are other threads for that. Q: Can I put a full wrap over another full wrap? A: Don't put a full wrap over a damaged wrap, because that would make you an idiot. Technically, a wrapped battery will fit in a shrink-wrapped sleeve. So yes, you can technically double-wrap. But remember... if you're dropping your double-wrapped battery in a circular battery compartment, it might get stuck. If you're paranoid about losing the dot-matrix info from your original wrap, just take a pic of it before you throw it away. Q: That white sticker has to be important. You say it's worthless. I would like permission to panic. A: When batteries leave Asia by air, they need stickers because there are dumb regulations. The manufacturers or master distributors are like "regulations shmegulations, we don't care." So a third party throws the stickers on, using cheap labor. Sometimes you'll get a sticker that's accurate, sometimes you won't. Even legit Samsung/LG/Sony batts can have inaccurate white labels. It happens. Don't panic. Q: Why do I need a wrap at all? A: To keep from shorting things and blowing yourself up. I'd explain the battery terminals of the 18650's, but someone will just come along and write it better. So just wrap your damn batteries. Q: Can you do me a favor and heat up a wrap without a battery in it? I just want to see what it looks like. A: Sure. Q: I hate metric. What are the inch measurements of wraps? A: Measurements for the most common sleeve: Length = 72mm = 2 13/16 inches Width, uncut/flat = 30mm = 1 3/16 inches Q: I have some protected batteries sitting around. But pre-cut wraps are too short. What do I do? A: Buy a roll. Get your battery measurement and add 8mm (or 5/16 inch). Cut that length. Done. Q: The wraps I just bought are not close to the correct size. What do I do? A: If they’re too long, cut them. If they’re too wide, you might have purchased the wrong ones, or they sold you the wrong ones by mistake. There are a ton of different battery wrap sizes and thicknesses available for all different single batteries and DIY packs. Q: I was using a metal caliper to measure the battery and things went wrong. What happened? A: Stupidity happened. Essentially, you turned your caliper into a coil. Moron.