Ultracaps are considered a very attractive technology because - unlike your laptop battery - they can be cycled many times over and they can also provide big bursts of power.
3
你的笔记本电脑,2年前还是超级酷的,现在电池寿命只有15分钟。
You know your laptop that was supercool 2 years ago now gets 15 minutes of battery life.