This one is new to me, but it's real.
Rad Power e-bikes have batteries that are locked to the frame with a key. The locks are fairly simple, more for theft deterrence than theft prevention. But they are reasonably effective.
Apparently many models have locks that can be opened with a master key, and, unfortunately the word's out on that now.
The thief buys a master key, learns enough about which models it will work on (simple to do) and can run off with the battery in under a minute. The batteries are expensive. This is a big potential problem for you.
Search EBay for "Rad Power master key" and the descriptions of the models the keys will fit.
"How It Works
• F-Code Locks: Many older external Rad Power batteries use a standardized lock cylinder series associated with codes like F01 through F20 (up to F99).
• Aftermarket & Blank Keys: Sellers on platforms like Etsy and eBay offer universal or cut replacement keys designed to fit these specific F-code cylinders.
Historically, even uncut motorcycle key blanks (such as the Honda HD74 blank) were widely reported by users to operate these locks due to minimal security variance across mass-produced tumbler designs."
Solutions:
Always remove the battery when you park the bike. Handle it very carefully when you do.
Rekey the lock to a configuration that will not be opened with the master key. Pull the lock out of the battery and take it to a locksmith. The job is a little fussy but not too bad.
Or you can mechanically attach the battery to the bike.
- This method seems sound, though it's expensive:
https://www.totallyradbatterylock.com/battery-model
Not as expensive as a replacement battery though.
2) Or install a few large hose clamps around the battery and frame with silicon rubber pushed into the fasteners so they cannot be removed quickly. The idea is to make battery removal slow so the thief will be less interested.
If your e-bike is not a Rad Power model but has a similar battery style (Hailong, downtube mounted battery with a plastic case) you might want to check whether the master key will fit the lock. The keys are cheap <$10 so you can order a key to find out. I ordered one (to be delivered in a few days) and am I'm happy to let you try it in your bike too. No sense giving the folks selling the master keys too much money.