What's the difference between AE-23 and A23?

As far as I can tell and I'm no expert, but there is no difference between the AE-23 12 volt battery and the A23 12 Volt battery. The popular brand companies use the A23 designator and off brand companies use the AE23 designator. Hope this helps

Nothing on the Amazon page or image says it's alkaline. Where does it indicate that it's alkaline?

if you llok close up on the battery its says alkaline on it. you may not see it in this picture, but if you look at other A 23 energizer picture you will see it.

what's the difference between the 23a and 27a batteries?

Google this " List_of_battery_sizes " (where I got answer). The A23 is 2/100 of longer" and 9/100" wider. So a 27a should fit where a 23a does fits in most cases, but not necessary the other way round. Both are 12V DC so no harm to a device if either battery fits and works in your device.

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Energizer Alkaline Batteries A23 (2 Battery Count) - Packaging May Vary

Product ID: 1892794

Details

Battery Capacity
50 Milliamp
Battery Cell Composition
Alkaline
Brand
Energizer
Number of Batteries
2 CR123A
Recommended Uses For Product
Watch

⚡50mAh long-lasting capacity

🌿Zero mercury eco-friendly

🔋12V high power output

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Description

🔋 Power up your life with Energizer’s compact, eco-smart energy boost!

COMPACT YET MIGHTY - Miniature design packs a punch with 50mAh capacity for extended device life
ECO CONSCIOUS ENERGY - Mercury-free batteries that reduce environmental impact without sacrificing performance
TRUSTED TOP RANKED - #1 in 12V batteries with 4.8-star rating from over 46,000 users
POWER YOUR ESSENTIALS - Reliable 12V alkaline power for keyless entry, remotes, and security devices
VERSATILE COMPATIBILITY - Seamlessly replaces multiple specialty batteries like 1181A, DL21, and V23GA

Energizer CR2 Lithium Batteries (2 Pack) deliver dependable 12V alkaline power with a compact 50mAh capacity, perfect for powering keyless entry systems, Bluetooth devices, cameras, and security gadgets. These mercury-free batteries combine long shelf life with eco-friendly design, trusted by millions and ranked #1 in 12V batteries for reliable, everyday performance.

Specifications

ASIN	B00004YK10
Amperage	23 Amps
Antenna Location	Watch
Battery Capacity	50 Milliamp Hours
Battery Cell Composition	Alkaline
Battery Cell Type	Alkaline
Battery Weight	0.6 Ounces
Best Sellers Rank	#329 in Health & Household ( See Top 100 in Health & Household ) #1 in 12V Batteries #2 in 3V Batteries
Brand	Energizer
Built-In Media	Battery Pack
Compatible Phone Models	Any equipment that operates on alkaline A23 batteries
Customer Reviews	4.8 out of 5 stars 46,130 Reviews
Global Trade Identification Number	00039800110091
Item Dimensions	3.4 x 1.8 x 0.4 inches
Item Type Name	Miniature-Retail Electronics
Item Weight	9 Grams
Manufacturer	Energizer
Model Name	ENR A23BPZ-2.Z4 ALA23 2PK COO CHINA
Model Number	A23BPZ-2
Number of Batteries	2 CR123A batteries required. (included)
Recommended Uses For Product	Watch
Reusability	Single Use
UPC	039800110091
Unit Count	2.0 Count
Voltage	12 Volts
Warranty Description	Comes with Manufacturer Warranty.

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¥932

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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