There are several factors that can be detrimental to a battery. Here are some common issues that can affect the performance and lifespan of a battery:

1. Deep discharge: Regularly fully discharging a battery can be harmful. Deep discharge can lead to sulfation of the battery plates, which may reduce the capacity and lifespan of the battery. It is important to recharge the battery in time and not wait until it is completely empty.

2. Overcharging: Overcharging a battery can damage it and shorten its lifespan. It is important to follow the manufacturer's charging instructions and use a suitable battery charger that regulates the charging current and voltage.

3. Long-term storage without maintenance: If a battery is unused for an extended period, it can lead to self-discharge and degradation of the battery capacity. It is advisable to regularly charge the battery during long storage periods to keep it in good condition.

4. Extreme temperatures: Exposure to extreme heat or cold can be harmful to a battery. High temperatures can lead to electrolyte evaporation, while cold can slow down the chemical reactions in the battery and reduce performance. Ideally, store the battery in an environment with moderate temperatures.

5. Incorrect connection: Incorrectly connecting the battery terminals can cause a short circuit and damage the battery. Ensure the positive and negative terminals are connected correctly and that there are no loose wires or connections.

To extend the lifespan of a battery, it is important to follow the manufacturer's recommendations, perform regular maintenance, and protect the battery from harmful conditions.