Is 1000 battery cycles a lot?

1000 cycles isn’t a “limit,” only a reference. You can go through many more cycles than that.

Is it harmful to keep MacBook plugged in?

Yes, in fact if you want to preserve your battery’s life as much as possible, you should leave it plugged in as much as possible. Your MacBook Pro has circuitry to protect the battery from over or undercharging. So you never have to worry about leaving it plugged in too much, or even leaving it unplugged too long.

What is the life cycle of a car battery?

Batteries (at current technology levels) typically have an automotive life of 7-10 years. At the end of that time, their capacity is degraded to 70-80\% of their original capacity, and they are less fit for mobility applications.

Can I use my battery after it’s maximum cycle count?

You can use your battery after it reaches its maximum cycle count, but you might notice a reduction in your battery life. Knowing how many charge cycles your battery has and how many are left can help you determine when a battery replacement is required.

How often should I replace my battery?

Batteries have a limited amount of charge cycles before their performance is expected to diminish. Once the cycle count is reached, a replacement battery is recommended to maintain performance. You can use your battery after it reaches its maximum cycle count, but you might notice a reduction in your battery life.

What can I do to improve the battery life of my Device?

This will result in shorter intervals between charging and lower battery capacity. When using your device, make sure the battery drains below 50 percent regularly. This will help minimize deterioration of the battery cells. Surface devices have features to reduce battery deterioration.

How much should you let your battery discharge before charging it?

Generally, the consensus seems to be that letting your battery discharge (without bottoming it out — aim for around 20 percent) and then charge it when possible is the best practice.

https://www.youtube.com/watch?v=Yf9N9zBgyB8