with a battery life of two years? and durable against going through the washing machine?

If you want simplicity and ruggedness we should never have moved away from steel keys.

Very few keys are made of steel. Brass is the most common material.

	▲	SoftTalker 6 days ago \| parent [-]
		The problem with brass is that it wears away and the small shavings of metal gunks up the lock mechanism. Mercedes used steel keys to avoid this.