6lb 6oz ultra light weight battery - Toyota Yaris Forums

BailOut · 09-02-2007, 04:52 PM

A 33lb weight difference translates into a 0.33 MPG increase.

With a $180 price tag it is around $120 more expensive than a standard 12V battery.

If you average, say, 40 MPG, a 0.33 MPG gain is a 0.825% increase.

If a gallon of gasoline costs $3.00, then this battery saves you 3.00 x 0.825 = $0.025 per gallon. If your average fueling is 10 gallons, this saves $0.25 per fueling.

At this rate it would take the battery 480 fuelings to break even. If you fuel up 3x per month it would take 40 years to achieve this.

In other words, it's not even close to being worthwhile.

09-02-2007, 04:52 PM	#4
BailOut Steals terrorist's lunch View User's Garage Drives: 2007 Yaris Liftback Join Date: Mar 2007 Location: Reno, Nevada, USA Posts: 1,299	A 33lb weight difference translates into a 0.33 MPG increase. With a $180 price tag it is around $120 more expensive than a standard 12V battery. If you average, say, 40 MPG, a 0.33 MPG gain is a 0.825% increase. If a gallon of gasoline costs $3.00, then this battery saves you 3.00 x 0.825 = $0.025 per gallon. If your average fueling is 10 gallons, this saves $0.25 per fueling. At this rate it would take the battery 480 fuelings to break even. If you fuel up 3x per month it would take 40 years to achieve this. In other words, it's not even close to being worthwhile. __________________ - Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs.

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