If you own an electric bike or are planning to buy one, here’s some advice on choosing the right battery, extending its life, and saving money.

Types of E-bike Batteries

• Modern e-bikes: Typically use lithium-ion batteries, offering the best range, reliability, and longevity.
• Older/second-hand e-bikes: May have nickel-cadmium or nickel-metal hydride batteries, which are heavier and offer less capacity, but can still be useful for short rides.

Mounting Options

• Rear rack-mounted: Suitable for lighter bikes and gentle rides but may affect handling with heavier loads.
• Downtube-mounted: Common and easy to access, but less protection from damage.
• Frame-integrated: Offers better protection, sleek design, and balanced handling. These are becoming more common, even in budget models.

Battery Capacity

• Larger capacity: Best for longer range and fewer charge cycles. Common sizes include 400Wh, 500Wh, and 625Wh.
• Smaller capacity: Ideal for lightweight or folding e-bikes that need portability or for shorter trips.
• Dual battery systems: Some brands, like Bosch, offer up to 1250Wh capacity for long-distance rides without battery swaps.

Estimating Range

• Basic rule of thumb: Divide battery capacity (in Wh) by 15 to estimate range (e.g., a 500Wh battery = ~33 miles).
• Factors affecting range: Power level, rider weight, terrain, and weather.
• Bosch Range Assistant: Useful tool for estimating range, though results can be optimistic.

Tips for Extending Battery Life

• Temperature: Charge and store batteries at room temperature; avoid extreme cold or heat.
• Charging: Don’t overcharge or fully deplete the battery, and always use the correct charger.
• Storage: For long-term storage, maintain the battery at around 30-60% charge, depending on the manufacturer’s guidelines.
• Handling: Avoid rough treatment or shocks that could damage the battery.

End of Life Options

1. Replace under warranty: If a fault develops, batteries are often covered for 2 years.
2. Buy a new one: Purchase a replacement from the original manufacturer to ensure compatibility.
3. Third-party batteries: Available for older e-bikes, but be cautious about quality and compatibility.
4. Recelling by experts: In some cases, you can have an expert recell your battery. While this is common in Europe, it’s still emerging in the UK. Make sure to choose a trusted provider to avoid safety risks.

Sources:
Cycling Electric UK
Ebikeling USA