Any idea what, if any, is the difference between these "ultra pro" batteries and the rayovac "high energy" batteries?

There may be literally no difference between the two, other than the UltraPro, historically, was marketed to business/non-profit/government in larger quantities and at a lower per-battery price, sold in 12-packs, whereas the retail batteries were sold in 4-packs, etc. Now, the lines between the two have blurred.

What voltage are these Rayovac UltraPRO Alkaline C Batteries, ALC-12, 12-Pack

I'm sure Kirk Bolton is correct. They are assuredly 1.5 volts. However, be careful about rechargeable size C batteries they are almost always 1.2 volts. I bought some and found out the 1.2 volts isn't forceful enough to power a Roomba Lighthouse or Virtual Wall- the gadgets that keep the Roombas in their place. The only 1.5 volt rechargeable ones that I have found are VERY expensive.

are these batteries ccan cell batteries

I don't understand the question. Not familiar with ccan.

What is the shelf life / expiration date?

Will vary by seller. Current newest available item has a Feb. of 2028 shelf life date. This is what we sell.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Rayovac Rayovac C Batteries, Ultra Pro Alkaline C Cell Batteries (12 Battery Count)

Product ID: 267191194

Details

Battery cell composition
Alkaline
Brand
Rayovac
Number of batteries
12 C batteries
Recommended uses for product
Power
Unit count
12 Count

⏳10-year shelf life power hold

🔋12-pack Ultra Pro alkaline cells

🛡️Leak-resistant, double-tested

Description

🔋 Stay powered, stay ahead — batteries built for the long haul!

LEAK RESISTANT ASSURANCE - Dual-tested to prevent damaging leaks and protect your equipment.
POWER THAT LASTS A DECADE - Store confidently with up to 10 years of reliable energy retention.
CONVENIENT RECLOSABLE PACKAGING - Keeps your batteries organized and ready for action whenever you need them.
ENGINEERED FOR PROFESSIONAL GEAR - Optimized for high-drain devices like flashlights and wireless tools.
MADE IN THE USA WITH GLOBAL EXCELLENCE - Proudly crafted in Fennimore, WI, blending local quality with global parts.

Rayovac Ultra Pro Alkaline C Batteries come in a 12-pack with reclosable packaging, designed for professional-grade performance in high-drain devices. Made in the USA with global components, these batteries feature leak-resistant technology and hold power for up to 10 years in storage, ensuring dependable energy when it matters most.

Specifications

ASIN	B0006HUVXI
Antenna Location	Power Flashlights
Battery Cell Type	Alkaline
Brand	Rayovac
Compatible Phone Models	battery powered toys, gaming consoles, high
Customer Reviews	4.7 4.7 out of 5 stars (6,525)
Included Components	Battery Tester
Item Dimensions	12.4 x 9.9 x 5.1 centimeters
Item Type Name	Battery
Item Weight	1.74 Pounds
Manufacturer	AmazonUs/RAYT9
Model Name	Ultra Pro Alkaline C Batteries
Model Number	ALC-12
Number of Batteries	12 C batteries required. (included)
Reusability	Rechargeable
UPC	012800474110
Unit Count	12 Count
Voltage	1.5 Volts

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