4 ms·

I think while the energy density has doubled the amount observed work from a battery seems constant. Laptops last a few hours, phones last around a day, etc. W

I think while the energy density has doubled the amount observed work from a battery seems constant. Laptops last a few hours, phones last around a day, etc. We’ve used that density to get thinner and lighter devices with slightly more performance that’s hard to observe from everyday tasks. The outlier is cars, where they’ve crept up as the density has come up.

moonchrome 4y ago
>I think while the energy density has doubled Has it really ? I remember the same mAh ratings or slight bumps in phones for many generations. 2016 Samsung galaxy s7 had 3000mah battery - latest ones have like 3700mah ? There have been larger batteries in bigger phones - but I'd like to have a 6000mah battery in a normal form factor. The only doubling I see is in 10 year period, but phone size grew considerably in that time as well. And smart watch batteries still suck no matter the price range.
- simonh 4y ago
  You’re not taking into account the weight of those batteries or their cost as components. A bigger phone might not just have a bigger battery, it might have a bigger cheaper battery with the same capacity. Only looking at the capacity doesn’t tell you anything useful about charge to weight.