Stolen e-bike batteries could be made worthless if Bosch was less greedy

Electric bikes built around Bosch’s smart drive systems will be getting a new digital Battery Lock function this summer that would make stolen batteries worthless to thieves looking to make a quick buck. Great idea — if only Bosch wasn’t being so greedy with the rollout.

Battery theft is a major issue. I’ve personally had to replace two stolen e-bike batteries here in the Netherlands, where over half of all new bicycles sold are electric. The mechanical locks protecting all those removable batteries can be defeated with force, costing owners anywhere from $300 to $1,000 — in the case of e-bikes built around Bosch systems — to replace the stolen battery, in addition to any costs required to repair the broken housing.

Bosch says that Battery Lock supports several digital keys that can be used simultaneously — in the form of the Bosch Flow app and Kiox 300 and Kiox 500 bike displays — or disabled to share batteries with family and friends. The digital lock is compatible with all batteries in the Bosch smart system, including DualBatteries and the PowerMore 250 Range Extender.

Once activated, Battery Lock will engage automatically when a Bosch-based e-bike is turned off. “If a locked battery is inserted into another e-bike with the smart system, it automatically deactivates its motor support and renders the entire e-bike unusable for the thief,” says Bosch in a press release shared with The Verge. “This also makes reselling the battery pointless, which reduces the risk of theft.”

In other words, once thieves realize there’s no market for the stolen Bosch batteries, they’ll stop trying to steal them. It’s all part of Bosch’s “vision of ensuring that no e-bike with a Bosch system is stolen in the future.” Great!

Image: Bosch

Here’s the catch: Battery Lock requires a Flow Plus subscription, according to the Bosch:

Battery Lock can be installed over-the-air as usual on any Bosch e-bike with the smart system via the e-bike Flow app and will be available from summer 2025 as part of the Flow+ subscription.

This is dumb. To be an effective theft deterrent, Battery Lock needs to be active on all Bosch smart system batteries, whether the owner subscribes to Flow Plus or not. Otherwise, there will still be a sizable resale market for thieves to profit from. Bosch does offer owners a free year of Flow Plus, which then costs $35 / £35 / €40 each year thereafter.

It makes sense to put premium services like an e-bike alarm with GPS tracking and notifications behind Flow Plus, like Bosch does now. But Bosch smart drive e-bikes already feature an integrated system lock that requires a digital key to activate the motor — no subscription required — and the same should be true for Battery Lock if the company’s zero-theft vision is to be believed.