About BatteriesDB
BatteriesDB is a guide website for people who need to find, choose, fit and safely handle the right battery. We cover all kinds of batteries, from tiny coin cells in key fobs and trackers to everyday AA, AAA and 9V cells and rechargeable packs.
Our goal is simple: give you clear specifications, honest compatibility notes and step-by-step replacement guidance, so you can get it right the first time.
Why This Site Exists
Battery codes, sizes and chemistries are confusing. Two cells can look almost identical and behave very differently, and the wrong choice can mean a device that will not work or, in some cases, a safety risk.
We built BatteriesDB to put the key facts in one place: what a battery is, what it fits, how to swap it, and what to watch out for.
What We Cover
Each guide focuses on a real replacement problem. Over time, our topics include:
Coin and button cells
CR2032, CR2025 and similar cells used in trackers, key fobs and small electronics.
Everyday batteries
AA, AAA, C, D and 9V cells for household devices.
Rechargeable batteries
Choosing, charging and replacing rechargeable cells and packs.
Device-specific guides
Which battery a particular device uses and how to change it.
Specs and compatibility
Voltage, size, capacity and what actually fits.
Safety and disposal
Safe storage, handling and recycling guidance.
How We Write Our Guides
- 1Start with primary sourcesWe rely on manufacturer product pages, technical datasheets and official device support pages wherever they exist.
- 2Separate fact from estimatePublished specifications are reported as published. Any editorial estimate, such as a difficulty score, is labelled as one.
- 3Write for the person with the device in handSteps are short, ordered and written in plain language, with safety notes placed where they matter.
- 4Keep guides currentProducts and packaging change. We revise guides when better information becomes available.
How This Site Makes Money
Some pages on BatteriesDB contain affiliate links. If you buy through one of them, we may earn a commission at no extra cost to you. This is how we fund the site.
A commission never changes the facts we report. We aim to be upfront about limitations, and we say so when a product might not suit your device.
Information, Not Professional Advice
Batteries can be dangerous if swallowed, damaged, short-circuited or disposed of incorrectly. Our guides are general information only. Always follow your device manual and the manufacturer’s instructions, and keep batteries away from children.
Specifications may vary between regions and product versions, so check the label on your battery and the documentation for your device.
Spotted a Mistake or Have a Request?
We welcome corrections, questions and suggestions for battery guides you would like to see. If something looks wrong or out of date, let us know and we will review it.