Do all batteries have the same efficiency? If batteries had specs

>>57329494
>If batteries had specs like phones, what would be the absolute best battery humans can make?
an Apple battery obviously

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>>57329530
>an Apple battery obviously

https://en.wikipedia.org/wiki/Energy_density

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Samsung batteries are the best.

It's a constant battle of voltage, amperage, battery life and space.
Phones don't need much voltage or amperage, but have little space
Laptops need higher voltages and currents, that's why even though it's 20x bigger than a phone battery it's only 3x the power
and of course anything rechargeable goes down the drain in specs because instead of 100%-0% you have 90%-50% then you have to recharge

lithium rechargeable batteries are voltage based, they start at high voltage and when they die they're low voltage. You need a certain voltage to power a device, if the battery can only supply .1v less than it needs the device won't work.
Devices are asking for like the maximum third of the entire voltage range of a battery

>>57329757
Like your dead battery might still have plenty of power at 8v but if your laptop needs 9v then it's just a dead battery

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>>57329494
the best battery is human body

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>>57329530
energy density
& recharge cycles

Is this bate.

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>>57329919
Forgot to mention that C rating crap, for max discharge and charging.

>>57329494
>Do all batteries have the same efficiency?

Non-rechargeable batteries pretty much do.

Rechargeable Ni-MH batteries are either optimized for a bigger charge or ability to hold their charge for longer periods.
It's a trade-off and you can never have both.

Li-ion batteries vary far more.