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Lithium-ion battery

A lithium-ion battery (Li-ion battery) is a rechargeable battery used in many modern devices – from smartphones and laptops to e-bikes. Due to its high energy density, low self-discharge, and long lifespan, it is now considered the standard in mobile power supply.

What is a lithium-ion battery?

A lithium-ion battery is an electrochemical energy storage device in which lithium ions move between two electrodes:

  • Anode (usually graphite)

  • Cathode (e.g., lithium metal oxide)

  • Electrolyte (enables ion transport)

During charging and discharging, lithium ions move back and forth between these electrodes – hence the name.

How does a lithium-ion battery work?

The mechanism is based on the movement of lithium ions:

🔋 While loading:

  • Lithium ions move from the cathode to the anode.

  • Energy is stored in the battery.

⚡ During unloading:

  • Lithium ions migrate back to the cathode

  • The stored energy is released as electric current.

This process is reversible and can be repeated for several hundred to a thousand charging cycles .

Advantages of lithium-ion batteries

Lithium-ion batteries have become the standard for good reasons:

  • High energy density → lots of energy at low weight

  • Low self-discharge → long shelf life

  • No memory effect → flexibly reloadable

  • Long lifespan → many charging cycles possible

  • Fast charging → short charging times

Especially in the field of e-bikes, these characteristics are crucial for range and everyday usability.

Disadvantages and challenges

Despite their advantages, there are also some limitations:

  • Aging : Capacity decreases over time.

  • Temperature sensitivity : Extreme heat or cold damages the battery.

  • Cost : Higher than with older battery technologies

  • Fire risk : Possible in case of damage or improper use

Typical areas of application

Lithium-ion batteries can now be found almost everywhere:

  • Smartphones and tablets

  • Laptops

  • E-bikes and pedelecs

  • Electric cars

  • Power banks

  • Tools (e.g. cordless screwdriver)

Lifespan and care

The lifespan of a lithium-ion battery depends heavily on usage. It can be significantly extended with the right measures:

Tips for a long lifespan:

  • Do not permanently discharge the battery to 0%

  • Ideal charging range: 20% – 80%

  • Protect from heat and frost

  • For longer storage: approx. 40–60% charge level

  • Use original chargers

Significance for e-bikes

In the e-bike sector, the lithium-ion battery is the central component. It determines:

Modern e-bike batteries now reach capacities of 400 to over 800 Wh , which can enable ranges of over 100 km – depending on riding style, terrain and support level.

Conclusion

The lithium-ion battery is a key component of modern mobility and electronics. Especially in e-bikes, it provides powerful, lightweight, and long-lasting energy storage. Understanding how it works and maintaining it properly can significantly extend its lifespan and ensure long-term, high performance.

Development
Dunlop valve (Blitz valve)

Published: March 31, 2026  |  Updated: March 31, 2026

E-Bike Akku für MYVELO Berlin - myvelo.de
E-bike battery

E-bike battery for MYVELO Berlin

€539,00
€539,00
€539,00 - €539,00
€539,00
€539,00 - €539,00
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