- “at present, the prototype battery can only hold a very small amount of energy – a few billion electron volts – for a matter of nanoseconds”
- “The key point is that quantum batteries are not about storing a great amount of energy, but about delivering it faster and with greater control”
1 Watt-hour is about 2 × 10²² electron volts. That’s a factor of about 10¹³/2⁴³.
For the sake of an argument, let’s give this tech faster than Moore’s law growth, doubling in charge time and amount of charge every quarter. Then (if my math is right), we’ll have a 1Wh battery (about what an AAA battery stores) that holds its charge for about a day in 10 years.
So, what is this useful for? It can discharge way faster than it gets charged, but don’t we have capacitors for that?
Highly controlled discharging might give it niche applications, but otherwise, I wouldn’t hold my breath for this tech to power “or even your phone?”.