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I have three M18 batteries that are from 2011, and have outlasted 4 Ryobi batteries that get much less abuse.

simondotau 2 days ago | parent | next [-]

Define abuse — because what Lithium Ion hates more than anything is long periods stored at over 80 percent, and especially heat stress while fully charged.

Batteries which are used regularly and spend more time between 20–80 percent full might be less "abused" than batteries which are used infrequently, and stored in a room which sometimes gets hot.

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therealpygon 2 days ago | parent [-]

I’d say the thing any lithium seems hate worse, for me, are long periods at 0%.

As a homeowner I’ve had Ryobi lithium batteries for over a decade. Other than having added a couple battery packs from deals and a couple batteries from tools, I’ve not had a single one of my batteries fail. All are being stored at the maximum charge. Some don’t last quite as long these days, to be expected with age, but not one has actually failed even from being dropped off ladders onto concrete. I did, however, have a Dewalt at work that died from falling 4 feet to the carpet floor. I’ve only had one Ryobi tool fail in that time, and those circumstances were questionable since someone had borrowed it.

Experiences are localized and subjective.

	▲	Panzer04 2 days ago \| parent [-]
		True 0V is very bad for lithium batteries, but extended periods at low SoC should be Ok (2.5V+). If there's any drain on the battery though low SoC can easily become 0V and dead battery (most chargers should refuse to charge those)

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Glawen 2 days ago | parent | prev [-]

Same with my blue Bosch batteries from 2010. They use quality cells