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 Miniature Alkaline

Product ID: 1892794

Details

Battery Capacity
50
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-voltage power

₹ 528

Duties & taxes included

In stock

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Description

🔋 Power up your smart life with Energizer’s compact giants!

COMPACT YET MIGHTY - Miniature size packs a punch with 50mAh capacity for extended device life
TRUSTED BY MILLIONS - Top-rated with 4.8 stars from over 48,000 users—join the power elite
ECO CONSCIOUS CHOICE - Mercury-free design reduces environmental impact without sacrificing performance
POWER YOUR ESSENTIALS - Reliable 12V alkaline energy for keyless entry, remotes, and security devices
VERSATILE COMPATIBILITY - Seamlessly replaces multiple specialty batteries like 1181A, DL23, and V23GA

Energizer A23 Batteries deliver dependable 12V alkaline power in a compact 2-pack, ideal for garage door openers, keyless entry systems, cameras, and security devices. With a long-lasting 50mAh capacity and mercury-free design, these miniature batteries combine eco-consciousness with trusted performance, making them the go-to choice for powering your essential electronics.

Specifications

ASIN	B00004YK10
Amperage	23 A
Antenna Location	Watch
Battery Capacity	50 milliamp_hours
Battery Cell Type	Alkaline
Battery Weight	17.01 g
Best Sellers Rank	#299 in Health & Household ( See Top 100 in Health & Household ) #1 in 12V Batteries
Brand	Energizer
Compatible Phone Models	Any equipment that operates on alkaline A23 batteries
Customer Reviews	4.8 4.8 out of 5 stars (48,342)
Global Trade Identification Number	00039800110091
Included Components	Battery Pack
Item Dimensions	3.4 x 1.8 x 0.4 inches
Item Type Name	Miniature-Retail Electronics
Item Weight	9 g
Manufacturer	Energizer
Model Name	ENR A23BPZ-2.Z4 ALA23 2PK COO CHINA
Model Number	A23BPZ-2
Number of Batteries	2 CR123A batteries required. (included)
Reusability	Single Use
UPC	039800110091
Unit Count	2 Count
Voltage	12 volts

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