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Bosch Smart System (BES3)Which replacement battery fits a Bosch Smart System (BES3) bike?
The replacement batteries that fit a Bosch Smart System (BES3) e-bike, and why another brand's pack will not work.
Fits with the right pack. A Bosch Smart System (BES3) bike takes a Bosch battery proprietary to the system, so the replacement is one of its own packs, most often the Bosch PowerTube 500 (smart system).
| Drive system | Bosch Smart System (BES3) |
|---|---|
| Voltage | 36 V nominal |
| Replacement packs that fit | Bosch PowerTube 500 (smart system) (500 Wh, 36 V, BES3); Bosch PowerTube 625 (smart system) (625 Wh, 36 V, BES3); Bosch PowerTube 750 (smart system) (750 Wh, 36 V, BES3); Bosch PowerTube 800 (smart system) (800 Wh, 36 V, BES3); Bosch CompactTube 400 (smart system) (400 Wh, 36 V, BES3); Bosch PowerPack 545 (smart system) (545 Wh, 36 V, BES3) |
| Charge port | Bosch smart-system round charge port |
| What will not fit | any battery from a different drive system, and packs from a different Bosch/Shimano generation |
A Bosch Smart System (BES3) bike is powered by a Bosch drive, and the battery is proprietary to it. The replacement is one of the system's own packs: Bosch PowerTube 500 (smart system) (500 Wh, 36 V, BES3); Bosch PowerTube 625 (smart system) (625 Wh, 36 V, BES3); Bosch PowerTube 750 (smart system) (750 Wh, 36 V, BES3); Bosch PowerTube 800 (smart system) (800 Wh, 36 V, BES3); Bosch CompactTube 400 (smart system) (400 Wh, 36 V, BES3); Bosch PowerPack 545 (smart system) (545 Wh, 36 V, BES3).
The Bosch smart system (BES3) is a clean break from eBike System 2. None of the parts interchange: a BES3 battery will not run in a BES2 bike and a BES2 pack will not run in a smart-system bike, even where the pack looks identical. Confirm the system on the display and the battery model number before buying.
Sources: Urban Arrow Service Center, Differences between Bosch eBike System 2 (BES2) and Smart System (BES3) · Qiolor, Bosch e-bike motor compatibility explained · Bosch eBike Systems, PowerTube and CompactTube batteries