I removed the downtube battery because I was finding that after most of my local laps, I'll still have +80% left over. I'm the kinda guy who gets annoyed when I pack 3 tshirts for a trip and only wear 2 (ie. I overpacked). I find it wasteful to carry that extra weight only to use a bit of it. So anyway, took it out, bought a range extender and never looked back. However, now I have all this room in the downtube and looking at my buddy's Enduro, I'm thinking "Why not suggest to Specialized that one day, they make a SWAT storage conversion kit for Levo SLs?" They make the carbon frame with the SWAT hole under the removeable bottle cage. With the battery in, if you open the SWAT hole, you just see the battery (maybe they put in a seal so water doesn't get onto the integrated battery). But if you are an owner who removes the downtube battery, you would buy a conversion kit where you basically push an insert up into the downtube which creates the SWAT cavity. After the conversion, if you open the SWAT hole under the bottle cage, voila...you have SWAT storage like your Enduro buddy. What do you guys think?!?!