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Old 03-02-2016, 03:25 PM
 
9,099 posts, read 9,274,654 times
Reputation: 4676

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I am looking at three different 9V batteries made by Rayovac. They use a lot of words to describe these batteries but no metrics. Is there some way to compare batteries on a uniform scale. For instance will the $3.50 battery last 4X as long as the $1 battery, or will it last 2x as long? What is mercury free? Does that mean it doesn't use Zinc Chloride?

$1 per battery: Heavy Duty 9V, 1-Pack Model: D1604-1D
A cost-effective power solution. The zinc chloride formula inside Rayovac Heavy Duty batteries is perfect for low-drain devices like clocks, radios, and remote controls.
Heavy Duty batteries are a great way to power low-drain devices at a great price!
Zinc Chloride formula

$5 per 2 batteries: Alkaline 9V, 2-Pack, Model: A1604-2F
Dependable power wherever you need it. Rayovac alkaline batteries last as long as Energizer® Max® and cost less, providing unbeatable value. This mercury-free formula is guaranteed fresh for 5 years, and the batteries come with a 100% money-back guarantee.
Mercury Free formula
Guaranteed fresh for 5 Years

$7 per 2 batteries:Fusion 9V, 2-Pack Model: A1604-2TFUS
Our Longest Lasting Battery
Energy Dense Formula provides MORE POWER vs. standard Rayovac® Alkaline
Excels in today's most power hungry devices Digital cameras, high-powered toys & grooming devices Power for the ALWAYS ON you!™
Mercury Free formula
Guaranteed fresh for 5 Years
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Old 03-02-2016, 03:37 PM
 
64,915 posts, read 66,401,599 times
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Rayovac leak like crazy
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Old 03-02-2016, 07:48 PM
 
11,921 posts, read 14,410,674 times
Reputation: 7560
Consumer Reports does testing on them. Look for the battery issue. Zinc chloride is junk. Very short life.
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Old 03-02-2016, 08:04 PM
 
Location: San Antonio/Houston
33,691 posts, read 51,979,871 times
Reputation: 83305
I don't care for the cheap brands.
Here is a great guide:
http://michaelbluejay.com/batteries/
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Old 03-02-2016, 08:58 PM
 
Location: Gilbert, AZ
3,003 posts, read 1,708,402 times
Reputation: 2945
Duracell alkalines are $2 each at Costco, and they have a coupon occasionally that drops the price a bit from there.
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