The Bosch PowerPack 400 is a 36 V lithium-ion e-bike battery with an integrated battery management system. It stores roughly 400 Wh of energy and weighs about 2.5 kg. This pack is built for electric bicycles running a Bosch eBike Systems drive unit. Specifically, it fits Active Line, Active Line Plus, Performance Line and Classic+ generation mid-drive motors.
Charging is straightforward with the standard Bosch 4 A charger. A full charge takes 3.5 hours, while a half charge to roughly 50 % takes just 1.5 hours. Because of that shorter cycle, you can top up during a lunch break and still ride home under power. The nominal capacity works out to approximately 11 Ah at 36 V.
The PowerPack 400 is produced in two mounting versions. One version mounts on the frame, along the down tube. The other mounts on the rear carrier. These two versions are not interchangeable, so the mount has to match your bike’s construction. Riders typically buy this pack as a second battery for longer routes, or as a replacement when an older unit no longer holds a charge.
Key Benefits
- Integrated BMS – manages cell operation and protection circuits throughout every ride.
- 400 Wh energy reserve – covers more kilometres on a single charge than smaller packs.
- Longer service life – the management system balances cells and spreads load more evenly.
- Fast charging – 3.5 hours for a full charge, 1.5 hours to about 50 % with the 4 A charger.
- Steady energy delivery – suited to daily commuting and regular recreational riding.
- Light 2.5 kg pack – removable, so you can charge it away from the bike.
- Two mounting versions – frame-mounted or carrier-mounted, matched to your bike.
- Genuine Bosch eBike Systems part – lithium-ion cells and 36 V nominal voltage.
Who Is This Battery For?
This pack is made for pedelecs equipped with Bosch eBike Systems drive units. It works with Active Line, Active Line Plus, Performance Line and Classic+ generation systems. Within the PowerPack family, it sits alongside the PowerPack 300 and PowerPack 500 and shares the same mounting logic.
However, it does not fit the newer smart system (BES3) generation. Those bikes require a PowerTube 750 or a PowerPack 545 / 725 instead. It is also not a power tool battery. Bosch Power Tools PBA, GBA and ProCORE packs use a completely different connector and voltage, so they cannot be substituted here.
Bikes running Bosch drive systems come from many manufacturers. Riese & Müller, Haibike, Cube, Trek, Kalkhoff, Gazelle and Scott all build them. Bosch itself supplies only the drive system, not the complete bicycle. Therefore, check your motor generation and mount type before ordering.
Technical Specifications
| Model | Bosch PowerPack 400 |
| Manufacturer | Bosch eBike Systems |
| Type | Electric bicycle battery (pedelec) |
| Cell technology | Lithium-ion (li-ion) |
| Nominal voltage | 36 V |
| Capacity (energy) | approx. 400 Wh |
| Capacity (amp hours) | approx. 11 Ah |
| Weight | approx. 2.5 kg |
| Battery management system | Integrated BMS |
| Full charging time | 3.5 h (4 A standard charger) |
| Half charge (~50 %) | 1.5 h (4 A standard charger) |
| Mounting versions | Frame-mounted or carrier-mounted |
| Compatible drives | Bosch Active Line, Active Line Plus, Performance Line, Classic+ |
| Not compatible with | Bosch smart system (BES3), power tool batteries |
Why Choose the PowerPack 400?
The main differentiator is the integrated battery management system. It balances the cells, guards against over-voltage and under-voltage, and monitors temperature. As a result, energy is drawn more consistently and the pack’s usable resource is protected across many charge cycles.
The 400 Wh capacity also sits in a practical middle ground. It carries more range than the PowerPack 300 while keeping weight at roughly 2.5 kg. Consequently, the bike stays balanced and the pack remains easy to lift off for indoor charging.
Charging flexibility matters too. Since a half charge takes only 1.5 hours, short opportunistic top-ups become genuinely useful. Riders who plan longer routes often carry this pack as a spare and swap it mid-journey.
Frequently Asked Questions
Which Bosch drive systems does the PowerPack 400 fit?
- Active Line and Active Line Plus mid-drive motors.
- Performance Line motors.
- Classic+ generation systems.
Is it compatible with the Bosch smart system (BES3)?
- No, BES3 bikes need different batteries.
- Those systems use PowerTube 750 or PowerPack 545 / 725.
- Connector and system architecture differ entirely.
How long does charging take?
- Full charge: 3.5 hours with the standard 4 A charger.
- Half charge to about 50 %: 1.5 hours.
What is the difference between the two mounting versions?
- One version attaches to the frame’s down tube.
- The other attaches to the rear carrier.
- They are not interchangeable, so match the holder to your bike.
Can I use this instead of a Bosch power tool battery?
- No, this is strictly an e-bike battery.
- PBA, GBA and ProCORE packs use another connector and voltage.
What are the capacity and weight figures?
- Around 400 Wh of energy, roughly 11 Ah at 36 V.
- Weight is approximately 2.5 kg.
Can it be used as a second battery?
- Yes, many riders carry a spare for longer routes.
- It also serves as a replacement when an older pack fades.
- It pairs within the PowerPack 300 and PowerPack 500 family.
Which bike brands use Bosch drive systems?
- Riese & Müller, Haibike, Cube and Trek.
- Kalkhoff, Gazelle and Scott also build them.
- Bosch supplies the drive system only, not the bicycle.
The Bosch PowerPack 400 combines a 400 Wh lithium-ion cell block, 36 V nominal voltage and integrated cell management in a 2.5 kg removable unit. Confirm your motor generation and mounting style, then choose the frame or carrier version accordingly.
There are no reviews yet.