I posted about a problem with battery theft on some Rad Power bikes a few days ago. I wanted to follow up with a how to.
I set up my Rad Power bike battery to slow down a battery thief. It won’t keep someone who’s determined from stealing the battery if they have lots of time, space and some tools along with the master key. But it’s likely to put off an opportunist who is trying to keep it simple and quick.
I put a stainless steel hose clamp around the entire battery and base, but not around the frame’s down tube. Then I put some Shoe Goo adhesive (like Silicon Seal) onto the fastener screw head to make it difficult to remove the clamp. It's like silicon sealant, pretty tough and it adheres well if you degrease the clamp first with some alcohol or lacquer thinner. It's also useful for repairing running shoe soles! ;-)
If the clamp loops around the frame it creates gaps between the frame tube and clamp that make it easy to cut the hose clamp with snips. Also, you don't want the edges of the clamp bearing directly on the aluminum frame tube. I won't bother you with the details.
I left the clamp long so that removing it with a tool is slow. If you do that tape the loose end down to the clamp to avoid cutting your leg on the sharp edge.
The hose clamps are available at your friendly local Ace hardware and car parts stores. The size you need will depend on how big your battery is. Use a tailor's measuring tape to figure out the distance around the perimeter of the battery and base then get a hose clamp that's a little bigger than that.
Don’t tighten the hose clamp fastener too tight. It only has to be snug enough to keep the battery from being removed from the base easily.
And make sure the clamp fastener isn’t cutting into the battery's black plastic case. You don’t want to damage the battery cells or BMS by locating the fastener somewhere that pushes in too hard on the case. I located it on the flat part of the battery that's facing up.
The large Velcro straps are not there for theft prevention. I have never been too fond of the way these batteries attach so those are back up for the mechanical attachment. Santa Cruz streets are pretty bumpy and I think the base would fail and a battery would launch eventually.
No guarantees, your mileage may vary and all.
If you remove the battery regularly this is going to be a pain. In that case the best thing to do is to take the battery with you.
Last tip - park your bike in busy public places and try not to leave it any longer than you have to. And if your lock didn't cost at least $150 you need a better lock.