Sony Cycle Energy Multi-Use Premium Rechargeable AAA Batteries (4-Pack) – NH-AAA-B4KN

The Sony Cycle Energy NH-AAA-B4KN rechargeable batteries are reliable, pre-charged AAA NiMH cells designed for everyday devices. They’re a smart fit for classrooms and shared tech because they hold charge well in storage, reduce replacement costs, and can be recharged hundreds of times.

At a glance

• Battery type: AAA rechargeable NiMH (Nickel Metal Hydride)
• Capacity: 800 mAh (typical)
• Pack size: 4 batteries
• Pre-charged: Yes – ready to use out of the package
• Recharge cycles: Up to 1,000 recharges
• Low self-discharge: Maintains ~75% charge after ~1 year in storage

Model naming note: NHAAAB4KN is commonly listed as the 800 mAh AAA Cycle Energy 4-pack.

Key features for education

• Cost-saving for schools: Reusable up to 1,000 times, reducing ongoing battery purchases.
• Ready when you need them: Pre-charged and low self-discharge means spares stay useful in storage carts.
• Good fit for shared devices: Ideal for remotes, wireless mice/keyboards, handheld recorders, small classroom audio gear, and testing accessories.
• Greener choice: One rechargeable set can replace many disposable batteries over its life.

Compatibility and charging

These are standard AAA NiMH cells and work anywhere AAA batteries are used. Recharge with any compatible NiMH smart charger. For best lifespan, districts typically rotate sets and use chargers with automatic shutoff.

Best use cases

• Classroom and library remotes
• Wireless keyboards/mice and presentation clickers
• Portable audio devices and recorders
• Testing and assistive-tech accessories

Buyer notes

• Capacity: 800 mAh is optimized for long life and reliable performance in low-to-moderate drain devices.
• Model status: Some regions list NH-AAA-B4KN as discontinued and replaced by newer Cycle Energy “Blue” AAA packs; performance/use is equivalent.
• Charger required: Batteries are pre-charged, but a NiMH charger is needed for long-term reuse.

Purchasing for schools and districts

Learning Headphones supports purchase orders, tax-exempt checkout, and volume pricing. If you’re standardizing rechargeables for classrooms or device carts, our team can help size the right quantity and recommend compatible chargers.