> Just asserted it was blatantly false and admitted it was true that full discharge damages the battery in the same paragraph, hoo boy.

No. He stated that, while discharging an individual cell below a certain voltage will damage it, the battery management circuitry on each cell will not permit the battery to discharge past that point. It simply disconnects the battery from the circuit, which means the only leakage is chemical (self-discharge), and thus very slow.

To clarify this point: "discharge fully" =/= zero percent. You will never want to go below a certain percentage of absolute charge.

"Another error on the part of the blogger is the claim that if the cars discharge fully, the battery packs will be damaged. This is blatantly false."

"It's true that a full discharge to zero percent state of charge can potentially be damaging to a battery."

This blogger is wrong. A 'battery' is a collection of cells. The Tesla site is correct in stating that. Like 'battery hens' (many hens) or an artillery battery (group of artillery), a 'battery' means collection of power cells. Yes, common usage has made it also mean a single power cell - but this doesn't mean that the technical term is not correct.

The word battery doesn't mean that. It means to beat and batter. Which is what artillery does.

The electrical meaning came much later, possibly from the electron discharges which looked like artillery attacks.

I have no idea where battery cage came from. The original battery cages were warmed with electricity - maybe an actual battery?

An artillery battery is an organised group of artillery pieces. It is not a single artillery piece, nor is it used to refer to the effects on the target. It's a noun, not a verb. It's "the artillery battery pounded the Viet Cong", not "the artillery batteried the Viet Cong"

A battery of chickens is an organised group of chickens. The chickens don't batter anything, and neither do the cages

A doctor might order a battery of tests on you, or a schoolkid might take a battery of academic tests - both of these things mean 'organised and related grouping' and not 'batter you down'.

The idea of organised grouping probably came from artillery battery, but in the current day, one of the meanings of battery is most definitely 'an organised, related group'.

New Oxford American Dictionary: ORIGIN Middle English: from French batterie, from battre ‘to strike,’ from Latin battuere. The original sense was ‘metal articles wrought by hammering,’ later ‘a number of pieces of artillery used together’; on this was based a sense ‘a number of Leyden jars connected up so as to discharge simultaneously’ (mid 18th cent.), from which sense 1 developed. The general meaning ‘a set or series of similar units’ ( sense 3) dates from the late 19th cent.