The Gen4 battery: how far it takes you and how it works.

It is called the Ecoride Power Pack 710 and runs at 36.9 V with 19.2 Ah, which means a capacity of 710 Wh. The battery cells come from LG in the 21700 format, and the battery is built for 800 charging cycles. A full charge takes 5 hours, but you reach 80 percent after just 2 hours. If you commute normally, charging once a week is enough.

We have integrated the battery into the down tube of the frame. It is not just to make the e-bike look better. The placement gives the bike a low and centered center of gravity, which you notice immediately when turning or riding with cargo at the rear. The difference compared with our older models, where the battery sat behind the seatpost, is clear as soon as you ride around the block.

When you need to charge indoors, you can remove the battery in under five seconds. We have built a locking mechanism that opens with the same key as the frame lock, so you do not have to keep track of several keys. If you prefer to leave the battery in the bike, you can also charge it through the port above the bottom bracket.

It depends on the temperature, your weight, tire pressure, and which assistance level you ride on. For the Ambassador 4, the range looks like this:

• LOW: 150 km above 15 °C, 100 km below 15 °C.

• MID: 120 km above 15 °C, 80 km below 15 °C.

• POWER: 90 km above 15 °C, 60 km below 15 °C.

That the range drops in cold weather is physics, not a battery fault. Lithium-ion cells temporarily lose capacity when it is cold, and performance returns when the temperature rises again.

Elcyklist.com recently carried out a range test on the Ambassador 4 in 15-degree weather and reached 132 km on the lowest assistance level, with a 92 kg rider on the road. That is about 12 percent below the maximum figure we state, which is expected when riding in real-world conditions rather than in a lab environment.

On the Loader 812, the range is instead between 50 and 140 km. The cargo bike weighs more and has higher rolling resistance, so the same battery takes you a shorter distance than on a city model. That is worth knowing if you are comparing the models.

If you commute to work in a Swedish city, your one-way trip is usually somewhere between 5 and 15 km. Let’s say you have a 12 km commute each way and ride four days a week. That puts you at around 100 km per week, and with Gen4, charging once a week is enough even if you ride in MID mode during winter.

A little more concrete for two of the cities where many of our customers commute:

If you live in Stockholm and travel from the inner city out to Solna, Sundbyberg or Sickla, you can manage the entire working week on one charge, cold weather or not. If you commute in Gothenburg, the hills around Älvsborg and Guldheden use more power than flat ground, but you can still get through the whole week in POWER mode, even when temperatures are below zero.

If you want to see which Gen4 models you can test ride, you can find us in Gothenburg and Stockholm, among other locations.

Part of the point of Gen4 is not actually about the battery itself, but about how the bike around it works. Our AVS system is a patented click system that lets you attach and remove accessories such as baskets, bags, and child seats without tools. Click on, click off. Atranvelo AVS+ on the rear rack supports 27 kg per position.

In practice, this means you can ride to preschool with a child seat at the back, click the seat off, attach a basket instead, and continue to the grocery store. The battery capacity is dimensioned so you can get through a day like that without the charge indicator deciding when you need to head home.

Another practical benefit is that the same accessories work on all Gen4 models. If you invest in a child seat for your Ambassador, it can follow you if you later upgrade to a Loader.

Before you visit a store, we want to be transparent about two things.

First: 710 Wh is a lot of battery capacity. It is valuable if you genuinely ride long distances, but if you only have a 6 km commute each way, you will rarely come close to emptying the battery. In that case, you are paying for capacity you do not use. For many people, that is completely fine. It simply means you charge less often and have plenty of margin. But it is worth knowing.

Second: the range figures apply when the temperature is above 15 degrees. If you live somewhere with long winters, you should plan based on the lower figures for five to six months of the year. There is still plenty of range for a regular commuter, but it is more honest to calculate based on winter capacity rather than summer capacity.

• 710 Wh, 36.9 V, 19.2 Ah.

• LG 21700 cells.

• 800 charging cycles.

• 2 hours to 80 percent, 5 hours for a full charge.

• Removable in under 5 seconds.

• Same key for the battery and frame lock.

• IP67-rated.

• Fitted on Ambassador Gen4, Tripper Gen4, Loader 811 and Loader 812.

If you are looking for an e-bike where charging becomes a weekend task rather than a daily routine, Gen4 is built for that. Visit us for a test ride, and you will feel for yourself how the low center of gravity makes a difference as soon as you sit on the saddle.