Shop by Battery Size

Start with a battery family, then jump to the exact size in one tap.

AA

Remote controls, toys, flashlights

AAA

Remotes, mice, compact devices

9V

Smoke detectors, test devices

CR2032

Key fobs, scales, sensors

CR123

Security systems, cameras

LR44

Watches, thermometers, toys

312

Hearing aid (brown tab)

18650

High-drain lights and electronics

AA

Most common household size

AAA

Slim electronics and remotes

C

Toys, lanterns, radios

D

High-capacity flashlights

9V

Safety and test equipment

CR2032

Key fobs and small electronics

CR2025

Car remotes and trackers

CR2016

Thin-profile electronics

CR1632

Medical devices and compact electronics

CR2450

Sensors and long-life key fobs

CR2430

Keyless entry and specialty remotes

LR44

Button-cell household devices

LR41

Thermometers and penlights

LR43

Small electronics and toys

357/303

Silver oxide watch batteries

10

Size 10 — yellow tab

13

Size 13 — orange tab

312

Size 312 — brown tab

675

Size 675 — blue tab

CR123

Security and tactical

4LR44

Pet collar battery

A23

Access control / key fob

A27

Garage openers and wireless doorbells

1/2AA

Meters and sensors (3.6V lithium)

Featured Products

Shop by Brand

Every major battery brand — plus our own house brand.

Duracell Energizer Rayovac Panasonic Renata Maxell Sony Murata BBW

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Battery Guides by Device

Shop faster by what you are powering.

Smoke Detectors

Find common 9V and backup battery options for residential alarms.

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Car Key Fobs

Match CR2032, CR2025, CR1632 and other coin sizes quickly.

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Hearing Aids

Shop sizes 10, 13, 312, and 675 with color-tab matching tips.

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Security Systems

Browse common alarm and sensor backup batteries by application.

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Cameras & Photo

Explore CR123, CR2, 2CR5 and other camera-focused battery types.

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Toys & Electronics

Find everyday AA/AAA/C/D/9V options for household devices.

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Need more help? Read the latest tips on our Battery Blog.

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Battery FAQs

Quick answers before you buy.

How do I find the right battery for my device?

Start with Shop by Battery Size above, use search by device, or contact us and we will match it for you. Call 347-586-0003 or email info@brooklynbatteryworks.com.

Do you sell batteries in bulk for buildings and businesses?

Yes. We support schools, churches, property managers, security companies, and other businesses with volume pricing and repeat ordering options.

How fast do orders ship?

Most orders ship quickly, and same-day delivery may be available in NYC for eligible orders. Use the checkout shipping options for current delivery estimates.

Do you ship outside the United States?

We primarily ship domestically. For international inquiries, email info@brooklynbatteryworks.com.

Can I return batteries I don't need?

Yes — unopened batteries can be returned within 30 days of purchase. See our return policy for details.

Do you carry replacement batteries for specific devices?

We carry batteries for thousands of specific devices — watches, hearing aids, security systems, medical instruments, tools, and more. Can't find yours? Call us.