The battery you’ll most often need for a 2016 Honda key fob is a CR2032 3-volt lithium coin cell. This is the standard size used by Honda remotes from that year. Some fob designs, though, may use a different small coin cell, so checking your specific fob is important.
Across 2016 Honda models—Civic, Accord, CR-V, Pilot, HR-V and others—Honda used a few different fob styles. The vast majority rely on CR2032, but a slim or alternate design can require CR1616 or CR2025. To be sure, inspect the battery inside your fob or refer to the owner's manual or dealership resources for your exact model and trim.
Identifying your key fob design
Knowing which design you have helps you confirm the right battery and avoid buying the wrong size.
Most common remote styles
Most 2016 Honda remotes use a two- or three-button design that typically uses a CR2032 battery.
Less common or slim remotes
A few trims or newer slim designs may use smaller CR-series cells such as CR2025 or CR1616. Confirm by inspecting the current battery.
Common battery sizes you may encounter
Before you buy, here are the sizes you might see in 2016 Honda fobs. The list helps you quickly verify what your fob requires.
- CR2032 — 3V, 20 mm diameter; the default for most 2016 Honda remotes
- CR2025 — 3V, 20 mm diameter but thinner (2.5 mm) than CR2032; may fit in some slimmer fobs
- CR1616 — 3V, 16 mm diameter; found in a few compact or specialty fobs
In practice, CR2032 will fit most standard Honda remotes from 2016; if your fob requires a slimmer or smaller cell, you’ll see a different size stamped on the battery or inside the case. Always verify the exact size before purchasing.
How to replace the battery
Follow these steps to safely replace the battery. The procedure is generally the same for CR2032 and other coin cells, but proceed carefully and consult the manual if you have a rare design.
- Find the seam where the two halves of the fob meet. Use a small flat tool or a coin to gently pry apart the case.
- Separate the halves carefully and avoid touching the circuit board inside.
- Remove the old battery and note its orientation (positive side up).
- Insert a fresh CR2032 (or the exact size you confirmed) with the positive side facing up.
- Reassemble the fob until it clicks shut and test the remote by locking/unlocking the car from a short distance.
After replacement, test the remote from indoor and outdoor distances to ensure reliable operation. If it doesn’t work, reseat the battery, check the seal, or seek professional service if moisture may have entered the fob.
Where to buy and practical tips
Choosing the right coin cell and purchasing from reputable sources helps ensure freshness and compatibility.
- Buy CR2032 from reputable retailers, auto parts stores, or electronics suppliers to ensure genuine cells.
- Check the expiration date on the package; lithium coin cells last long but can degrade over time.
- Keeping a spare CR2032 in a safe spot makes future replacements quick and easy.
Store spare batteries in a cool, dry place away from heat or moisture to maximize shelf life.
Summary
For a 2016 Honda key fob, CR2032 is the standard battery. Verify the exact size by inspecting your current battery or consulting the manual for your specific model and trim, replace carefully, and keep a spare on hand for future use. If in doubt, a quick check with a dealer or parts retailer will confirm the correct cell.