Does the normal Energizer charger work for these or do they require a special charger?

Have always used non-specific charger (not energiser charger) for recharging all brands of battery. Certainly these batteries needed no special, different charger

Are these 2300, as per the description, or 2450 as per the text on the box in the photo?

Yes - bought these also in 2014 and they were 2300, as per the description.

What are these batteries made of?

This Batteries are made up of Nickel Metal Hydride. For further information on composition please refer the below mentioned link. "http://data.energizer.com/pdfs/nickelmetalhydride_psds.pdf"

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Description

♻️🔋 Power up smarter, play longer, and save the planet.

GREEN INNOVATION - World’s first rechargeable AAA battery made with 22% recycled materials—lead the charge in eco-conscious tech.
POWER THAT LASTS - Up to 5x longer runtime in high-drain devices like cameras and gaming controllers—stay unplugged, stay unstoppable.
READY WHEN YOU ARE - Holds charge up to 12 months in storage—always ready to power your next big moment.
LEAK PROOF CONFIDENCE - Engineered leak protection safeguards your essential devices—no more messy surprises, just reliable power.
ECO CHIC RECHARGEABILITY - Charge hundreds of times with NiMH tech, reducing waste and saving you money—because sustainability is the new luxury.

Energizer Recharge Extreme AAA batteries deliver 800 mAh of reliable NiMH power with up to 5x longer life in digital cameras. Packaged in 100% recyclable, plastic-free materials, these rechargeable batteries feature advanced leak protection and hold charge for up to 12 months, making them the top choice for eco-conscious professionals who demand performance and sustainability.

Specifications

Manufacturer	Energizer
Part Number	ENR Extreme NH12 800 BP4 Pre-Ch
Product Dimensions	7.95 x 1.1 x 11.4 cm; 12 g
Batteries	1 A batteries required.
Item model number	ENR Extreme NH12 800 BP4 Pre-Ch
Size	AAA
Colour	Green
Style	AAA Batteries (Pack of 4)
Pattern	Single
Power Source	Hand Powered
Voltage	1.2
Item Package Quantity	1
Display style	No Display
Included Components	Components included in description
Batteries included?	No
Batteries Required?	Yes
Battery Cell Type	NiMH
Battery description	AAA
Battery Capacity	800 Milliampere Hour (mAh)
Item Weight	12 g

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