Is it bad to leave an electric bike battery on a charger?

Leaving an electric bike battery on the charger for extended periods isn't ideal, but most modern chargers are designed to stop charging once the battery is full, preventing overcharging. However, constantly keeping the battery plugged in after it reaches 100% can contribute to wear over time, reducing its overall lifespan. To preserve battery health, it's best to unplug the charger once the battery is fully charged, or to charge it to around 80-90% for daily use. Also, avoid charging in extreme temperatures, as that can affect performance and longevity.