A Tern GSD (eBike System 2 cargo) runs the Bosch eBike System 2 (BES2), so it takes the Bosch PowerPack 500 (eBike System 2) (500 Wh, 36 V, 13.4 Ah). The exact pack, the charger, and the trap to avoid.
Updated 05 September 2026.
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Bosch eBike System 2 (BES2)Which replacement battery fits a Tern GSD (eBike System 2 cargo)?
The replacement battery that fits a Tern GSD (eBike System 2 cargo), the charger it uses, and what not to buy.
Fits with the Bosch PowerPack 500 (eBike System 2). A Tern GSD (eBike System 2 cargo) runs the Bosch eBike System 2 (BES2), so the replacement battery is the Bosch PowerPack 500 (eBike System 2) (500 Wh, 36 V, 13.4 Ah).
| Bike | Tern GSD (eBike System 2 cargo) |
|---|---|
| Drive system | Bosch eBike System 2 (BES2) |
| Battery that fits | Bosch PowerPack 500 (eBike System 2) (500 Wh, 36 V, 13.4 Ah) |
| Charge port | Bosch smart-system round charge port |
| Charger | Bosch Standard Charger 4A (eBike System 2) |
The Tern GSD (eBike System 2 cargo) runs the Bosch eBike System 2 (BES2), a Bosch drive whose battery is proprietary to the system, so the replacement pack is one of its own, most often the Bosch PowerPack 500 (eBike System 2) (500 Wh, 36 V, 13.4 Ah), charged through the Bosch smart-system round charge port.
This is Bosch eBike System 2, not the smart system: a smart-system PowerPack 545 or smart-system PowerTube will not fit or charge here through the oval port, so match the pack to the BES2 generation.
Questions and answers
Which replacement battery fits a Tern GSD (eBike System 2 cargo)?
Fits with the Bosch PowerPack 500 (eBike System 2). A Tern GSD (eBike System 2 cargo) runs the Bosch eBike System 2 (BES2), so the replacement battery is the Bosch PowerPack 500 (eBike System 2) (500 Wh, 36 V, 13.4 Ah).