Electric Bike Batteries - FAQ's Costs, Range and Charging

What You Need to Know About Your E-Bike Battery

Charge, Power On, and Ride!

Before you set off, make sure the battery is fully charged. Depending on the model, you can remove the battery from the bike for easy charging at home. To activate the battery, most require turning on a switch or pressing a button. Once on, a charge indicator will light up on the battery or near the power switch. For specific details, check the manufacturer's manual, which will also explain the charge gauge. Then, simply power on your display, select your assistance level and ride mode, and you're ready to go!

Understanding Energy Content (Watt-Hours)
The key factor in comparing batteries across different brands is their energy capacity, measured in watt-hours (Wh). A higher Wh value means a greater range per charge. Most e-bike batteries range from 250 Wh to 600 Wh. Keep in mind, a larger battery capacity also adds weight to the bike. You can often tell the energy capacity from the battery name, but it will also be clearly marked on the battery. You’ll also find the voltage (V) and capacity in ampere-hours (Ah), and multiplying these gives the watt-hours.

How Much Does It Cost to Fully Charge an E-Bike Battery?
To get the most out of your e-bike's pedal assist, it’s best to recharge the battery after each ride. The cost of charging depends on the battery's energy capacity, how often you charge it, and your electricity provider.

Modern e-bike batteries typically range from 250 Wh to 600 Wh. In the UK, the average cost per kilowatt-hour (kWh) is around 14 pence (as of 2017). Based on this, here are the costs to fully charge your e-bike:

How Long Does an E-Bike Battery Last?
While e-bike batteries don't last forever, most brands estimate a lifespan of around 1,000 charge cycles. This estimate assumes the battery is fully discharged each time, which is uncommon in regular use. In practice, you'll likely get more than 1,000 cycles before the battery stops working. Over time, the range per charge will decrease. To compensate for this, consider purchasing a spare battery. Depending on the manufacturer and how well the battery is cared for, it can last anywhere from 2 to 5 years before needing replacement.

What Happens If Your Battery Runs Out Mid-Ride?
For longer trips, it’s advisable to carry a spare battery or check for charging stations along your route. While your e-bike can still be ridden without engine assistance, the extra weight of the motor and battery may make it feel like you're riding with the brakes on. However, the bike will remain functional, allowing you to reach the next charging station.

How to Extend the Life of Your E-Bike Battery

• Store your battery in a dry place, ideally between 0-20°C.
• Avoid leaving your e-bike in direct sunlight or exposing it to freezing temperatures.
• Always use the manufacturer's charger.
• Recharge the battery after every ride if possible.
• In the early stages, fully discharge and recharge the battery 3-5 times to maximize its capacity.
• After initial use, avoid discharging the battery completely.
• Charge the battery at least once every 6 months, even if you don’t use it regularly.
• For optimal storage, keep the battery at 30-70% charge.
• In winter, remove removable batteries and store them indoors, reattaching them just before use.
• Never submerge the battery in water or clean it with high-pressure water.
• Regularly wipe off dirt with a damp cloth and keep battery contacts clean.

How Far Can You Travel on a Full Battery?
The distance you can cover on a single charge varies based on multiple factors, but manufacturers provide estimates for maximum range. Don’t be discouraged if you don’t reach the stated distance—actual conditions may affect performance.

Tips to Maximize Your E-Bike Battery Range
Several factors affect the range of your e-bike, but you can optimize it with these tips:

• Use the highest power assistance levels only when climbing or starting.
• Start in a lighter gear and shift progressively to heavier gears as you accelerate.
• Maintain proper tire pressure to reduce rolling resistance.
• Adjust your riding position (e.g., saddle height) to reduce wind resistance.
• Use lighter gears on inclines to avoid putting unnecessary strain on the motor.
• Keep weight down by minimizing the contents in your bike's bags.
• Ride smoothly by accelerating gently and braking efficiently.
• Stick to paved roads to avoid the added resistance of rough terrain.
• If possible, ride above 15 mph, as the motor assist typically cuts out above that speed.

By following these steps, you can help prolong your battery's lifespan and maximize its range.