Is your BMZ battery losing power? We’ll get it back on track.
The battery manufacturer BMZ produced the batteries for the Go SwissDrive system. Many well-known brands such as Bulls GreenMover, Tour de Suisse, Radrezept, and Santos used these batteries.
They are known for their longevity, but even here the cells deteriorate after a few years.
We replace the old cell packs. We often use more modern cells to increase the range of your e-bike.
We repair electronic faults and replace defective components.
We read the system data and perform capacity tests under real load conditions.
If your battery no longer charges after winter, we will try to reactivate the system.

Error diagnosis
BMZ electronics repair
BMZ electronics replacement
Deep discharge elimination
BMZ cell replacement 36V 15.5Ah
BMZ battery calibration

Fehlerdiagnose
Reparatur Elektronik BMZ
Austausch Elektronik BMZ
Tiefentladungsbeseitigung
Zellentausch BMZ 36V 16.75Ah
BMZ Akkukalibrierung

Error diagnosis
BMZ electronics repair
BMZ electronics replacement
Deep discharge elimination
BMZ cell replacement 36V 15.5Ah
BMZ battery calibration

Error diagnosis
BMZ electronics repair
BMZ electronics replacement
Deep discharge elimination
BMZ cell replacement 36V 12.4Ah
BMZ battery calibration

Error diagnosis
BMZ electronics repair
BMZ electronics replacement
Deep discharge elimination
BMZ cell replacement 36V 17.5Ah
BMZ battery calibration

Error diagnosis
BMZ electronics repair
BMZ electronics replacement
Deep discharge elimination
BMZ cell replacement 36V 13.8Ah
BMZ battery calibration

Error diagnosis
BMZ electronics repair
BMZ electronics replacement
Deep discharge elimination
BMZ cell replacement 36V 17.5Ah
BMZ battery calibration
Simply fill out our form and describe what is wrong with your battery.
You don't have to decide on a service yet—we'll take a look at it.
You will receive a confirmation with all further information.
Since batteries are considered hazardous goods, you have two options:
In person: Bring your battery (and charger!) directly to us in Rapperswil. This is the safest option and does not cost you any postage.
Shipping: Swiss Post does not transport used lithium batteries. Please use a private logistics service provider and pack the battery well-padded in a sturdy cardboard box.
Our specialists will thoroughly examine your battery.
Only after the diagnosis do we decide together which repair (e.g., cell replacement or electronics check) really makes sense.
Once everything has been checked and tested, you can pick up your battery from us again or we can arrange for it to be returned to you by a specialist shipping company.
Register your BMZ battery now—we will get back to you quickly and discuss how to proceed.
Check the label on your battery (see example photo).