E-bike: getting the most range out of your battery

The range printed on the box is an optimistic bracket, measured under conditions that look nothing like your Sunday ride. The good news: the gap between 40 and 90 km on the same battery comes down to a handful of simple habits, and above all to the way you plan the route.

1. Think in watt-hours per kilometre

Your battery has a capacity in watt-hours (Wh), printed on the casing: 400, 500, 625, sometimes 750 Wh. In the real world, an e-bike uses roughly 7 to 20 Wh per kilometre depending on assistance level, terrain and wind. A 500 Wh battery at 10 Wh/km gives you 50 km; on full assist over rolling terrain, that same battery can drop below 30 km.

Do the maths once with your own gear: note the distance covered and the percentage used over two or three typical rides. You'll end up with your actual consumption, far more useful than any brochure figure.

2. Elevation is the biggest drain

Climbing means lifting weight against gravity, and the motor picks up the bill. A 40 km route with 800 m of elevation gain empties a battery far faster than 60 km of flat. It's the most powerful lever, and also the easiest to control before you leave: by picking the Flat or E-bike optimised profile in the VéloCore planner, you smooth out the track and skip the pointless walls. Our article on choosing your route profile explains what each option does.

3. Drop down one assistance level

Going from the middle mode to the maximum often doubles consumption to gain two or three km/h. Save the high mode for what genuinely deserves it: hill starts, pulling away at traffic lights, the end of a ride when your legs are gone. On the flat with a tailwind, the lowest mode is nearly always enough, and you won't be much slower.

4. Spin, don't grind

A mid-drive motor is at its most efficient at a brisk pedalling cadence, generally around 70 to 90 revolutions per minute. Staying in a big gear at 50 rpm forces the motor to deliver a lot of torque, which draws far more from the battery. Shift down before the climb rather than halfway up it, exactly as you would on an analogue bike.

5. The free gains: tyres, weight, position

• Tyre pressure. The most rewarding and most neglected adjustment there is. An underinflated tyre noticeably increases rolling resistance. Check before every ride and stay within the range marked on the sidewall.
• The weight you carry. Every kilo counts on a climb. Half-empty panniers, a heavy lock, spare bottles you won't drink: sort it out before leaving.
• Your position. Above 20 km/h, air becomes the main thing slowing you down. Sitting bolt upright into a headwind is expensive in range.

6. Cold weather costs you part of your battery

Lithium-ion cells temporarily lose capacity as the temperature drops: in cold weather it's not unusual to see 20 to 30 % less range. The fix is easy: store and charge the battery indoors, only fit it to the bike as you leave, and use a neoprene cover if you ride regularly below 5 °C. The lost capacity comes back as soon as the battery warms up.

7. Look after the battery over the long run

Today's range also depends on the battery's health across hundreds of cycles. Three habits that change everything: avoid running it flat on every ride, don't leave it plugged in at 100 % for weeks, and if you don't ride through the winter, store it between 30 and 60 % charge in a room-temperature space. A top-up every couple of months is enough.

8. Build the route around your real range

Once you know your consumption, planning becomes arithmetic. Draw the loop, look at the distance and elevation gain shown, apply your Wh/km and keep 20 % in reserve for headwind and the unexpected. Save the route to your account: it appears in the app cockpit with turn-by-turn navigation, so you can track the kilometres left while riding without taking the phone off its mount. VéloCore's features cover the whole journey, from planning on a big screen to guidance on the road.

Read also: Choosing your route profile · Winter cycling: kit and safety