If the lock, unlock, trunk or panic button works only close to a 2014 Honda Civic sedan—or the transmitter indicator no longer lights—a weak coin cell may be responsible. This guide covers the original conventional master key with remote transmitter: the screw-fastened key that uses one CR1620 battery. It excludes the smart-entry remote, which uses CR2032 and opens differently. A remote battery has no dedicated OBD-II trouble code, and a scan tool cannot prove this coin cell is weak.
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Beginner; careful handling of a tiny screw and plastic tabs
10–20 minutes, including functional checks
About $4–$10 for one CR1620; planning allowance
Safety before opening the key
Park safely, shut the Civic off and work at a clean, dry table where the screw and battery cannot disappear. Do not charge, crush, puncture, short, heat or burn the cell. Stop if the old cell has leaked, the shell is cracked, the screw is stripped, or a contact is loose or corroded. A damaged key requires electronics or locksmith service rather than improvised shims.
This is a handheld-key procedure. No vehicle lifting, under-hood battery disconnection, fluid work or high-voltage access is involved. Honda specifies a small Phillips screwdriver and a cloth-wrapped small flat-tip screwdriver. No threaded vehicle fastener is disturbed, and Honda gives no torque value for the tiny plastic-cover screw; tighten it only enough to secure an undamaged cover.
Featured battery and exact package
Duracell CR1620 3V lithium coin battery, one-count package; ASIN B07GN2H5BS. The selected Amazon variation is “1 Count” and contains one battery in child-resistant retail packaging. Duracell identifies 1620 as equivalent to DL1620 and CR1620. No separate retail manufacturer part number beyond those cell designations was independently established, so none is invented here.
The package does not include a Honda key, remote shell, screw, button pad, circuit board, screwdriver, programming service or second battery. Match CR1620 to Honda’s manual and the designation on the removed cell before installation. Do not substitute CR1616, CR1632, CR2025 or CR2032 because another cell is also rated 3 volts; thickness and diameter affect seating, contact pressure and safe case closure.
Check the exact Duracell one-count package
Amazon purchase indicator observed live on the exact selected listing on October 23, 2026: “3K+ bought in past month.” This is a rounded marketplace badge, not an audited sales count, not a Civic-specific demand measure and not evidence of a global best-seller claim. No current price, seller or inventory promise is made here.
Fitment: identify the key before buying
| Vehicle or remote | Coverage | Required check |
|---|---|---|
| 2014 Honda Civic sedan with original conventional master key and remote transmitter | Covered | Integrated metal key, small retaining screw in the cover and one CR1620 cell matching Honda’s manual. |
| 2014 Civic sedan original smart-entry remote | Excluded | It has a removable built-in key, a screwless coin-opening procedure and one CR2032. Use the separate smart-entry guide. |
| Aftermarket, replacement or reshelled key | Not automatically covered | Its screw, tabs, holder and battery may differ. Follow its maker’s identification and opening instructions. |
| Civic coupe, other years, other markets or other Honda models | Not established here | A similar shell is insufficient evidence. Verify the exact owner manual and installed cell. |
Engine, transmission and drivetrain do not select the battery for this job; the physical key design does. Option names can also mislead if a prior owner replaced or reshelled the key. If your case has no screw, has a removable built-in key, or reveals anything other than CR1620, stop and identify that remote separately.
Symptoms and diagnosis before replacement
Honda’s manual says to replace the button battery if the indicator does not come on when a transmitter button is pressed. Reduced range or intermittent lock, unlock, trunk or panic response can also justify checking the cell. Compare the key with a known-working spare from the same Civic in the same location, if available. That comparison helps distinguish one weak transmitter from a vehicle-side problem or radio interference.
A battery is not proven bad merely because one door stays locked. If both transmitters fail, one door alone refuses to respond, or the Civic has broader 12-volt electrical symptoms, investigate the vehicle battery, receiver, fuse, lock wiring or door actuator. A key dropped on a hard surface or exposed to liquid can have a damaged switch, circuit board or contact that a new coin cell will not repair.
Inspect the cover before disassembly. The screw head should be intact, the seam should not be glued and the buttons should move normally. The mechanical key can continue starting and unlocking the car while the remote section fails; that does not confirm the coin cell is the only fault. Honda’s battery-exchange procedure contains no programming or relearn step. If a correctly installed fresh cell does not restore operation, diagnose the key and vehicle instead of trying unsupported internet reset sequences.
Tools and supplies
| Tool or Supply | Exact Product | Product Link | Purpose and Selection Check |
|---|---|---|---|
| Required replacement cell | Duracell CR1620/DL1620 3V lithium coin battery, one-count package, B07GN2H5BS | Exact one-count battery | Use one cell only after the screw-fastened Honda key and CR1620 marking are confirmed. |
| Small Phillips and flat-tip drivers | STANLEY 66-344 4-in-1 pocket screwdriver, one tool, B0014KMDZ0 | Exact pocket driver | Includes #0/#1 Phillips and 1/8-/5/32-inch slotted tips. Use only a tip that fully fits the actual screw or release point; an existing suitable precision driver is preferable to forcing this one. |
| Protective wrap — required | Clean, dry, grit-free soft cloth already owned | No purchase needed | Honda says to wrap the small flat-tip screwdriver to reduce scratching. Keep cloth fibers out of the holder. |
| Parts control and disposal | Small clean cup plus existing non-conductive tape | No purchase needed | Account for the screw and immediately isolate the removed cell’s terminals before secure recycling. |
No scanner, torque wrench, replacement fastener, lubricant, vehicle-battery disconnect or programming subscription belongs in a normal coin-cell exchange. Do not spray cleaner into the opened transmitter or use a magnetized tool to pry against the circuit board.
Estimated DIY versus professional cost
| Cost item | Planning allowance | Assumption |
|---|---|---|
| One CR1620 package | $4–$10 | Estimate, not a current Amazon quote; one cell completes one matching key. |
| Precision driver | $0 if suitable tools are owned; about $8–$20 if purchased | A tip must fit the actual screw and case opening. |
| DIY total | About $4–$30 | Undamaged original key; no electronic diagnosis or shell replacement. |
| Dealer, parts counter or locksmith service | About $15–$50 | Battery plus possible minimum service charge; local rates vary. |
A replacement key, cutting, immobilizer registration, circuit-board repair or vehicle diagnosis is outside these estimates. Ask what a quoted service includes before comparing it with a battery-only DIY job.
Numbered replacement steps
- Confirm the key and battery. Verify a 2014 Civic sedan original conventional master key with remote transmitter, an integrated metal key and a small cover screw. Keep the new package closed until the work area is secure from children.
- Prepare a controlled work surface. Set the key, fitting drivers, cloth and parts cup on a clean table. Keep drinks, conductive clutter, pets and children away. Test the transmitter indicator and buttons once so you have a before-repair baseline.
- Remove the cover screw. Select the smallest Phillips tip that fully fills the screw recess without wobble. Hold it square, apply gentle downward pressure and turn counter-clockwise. Place the screw in the cup immediately. If the driver cams out or the head is already damaged, stop before making removal harder.
- Open the transmitter. Honda instructs opening the remote after the cover is unscrewed. Wrap the small flat-tip screwdriver with the clean cloth, place it only at the intended edge or seam and use controlled pressure. Do not drive the blade toward the circuit board. Stop if the shell bends, whitens or appears glued.
- Record the original cell orientation. Before moving anything, photograph the holder and note which marked face is visible. Locate the polarity symbol and confirm the old cell says CR1620. The markings in the actual original key and Honda’s diagram take priority over memory or another remote.
- Remove the old battery. Honda specifies the small flat-tip screwdriver. Use the wrapped tip at the release point and lift gently without scraping the board, bending a spring contact or scattering buttons. Immediately place the removed cell where it cannot be swallowed or shorted; tape both faces.
- Install one fresh CR1620. Open the child-resistant package only now. Handle the new cell by its edge and place it in the same polarity as the original and holder marking. It must sit flat and securely under the contacts without force. Do not stack cells, add foil or bend a terminal to compensate for a loose fit.
- Close and secure the key. Confirm the buttons and any internal insert remain correctly located. Align the cover and press evenly around the seam until the tabs are fully engaged. Reinstall the small screw by hand and stop when the cover is secure and the seam is even; do not crush the plastic while chasing an invented torque value.
Final inspection and functional checks
Inspect the entire seam, screw and button openings. The case should feel solid, and each button should return normally instead of binding under the cover. Account for the old cell, packaging and every tool. Take the taped old battery promptly to a suitable collection point; do not leave it in a cup or drawer accessible to children.
With the Civic parked, test lock and unlock from nearby while keeping a working mechanical key or spare available. Then test the trunk release and panic button only where doing so is safe and will not disturb others. Confirm the indicator illuminates and the vehicle produces the expected response. If a button sticks, reopen the case and correct its alignment rather than pressing harder.
If the transmitter remains dead, recheck exact cell designation, polarity, flat seating, contact condition and case assembly. A second known-good CR1620 can rule out an unusually weak new cell. Persistent failure points to the key electronics or the vehicle-side receiver, locks, fuse or 12-volt supply; it does not justify installing the wrong battery or repeatedly tightening the screw.
Common mistakes to avoid
- Confusing the two 2014 remote designs: the conventional screw-fastened key uses CR1620; Honda’s smart-entry remote uses CR2032.
- Buying by voltage alone: another 3-volt cell may have different dimensions and can damage contacts or prevent closure.
- Using a poor driver fit: a worn or undersized Phillips tip can strip the small screw.
- Prying toward electronics: use the cloth-wrapped flat tip only at the intended case edge.
- Losing polarity: photograph the installed cell and read the holder before removal.
- Overtightening the screw: secure plastic needs gentle hand pressure, not a power tool or guessed torque.
- Leaving the old cell loose: isolate both faces and secure it immediately for proper collection.
- Assuming every no-response symptom is the cell: the switches, board, contacts, receiver, door actuator and vehicle electrical system can also fail.
Frequently asked questions
Does every 2014 Civic remote use CR1620?
No. Honda specifies CR1620 for the conventional master key with remote transmitter and CR2032 for the smart-entry remote. Identify the physical key before ordering.
Does a normal battery replacement require programming?
Honda’s owner-manual cell-replacement procedure lists no programming or relearn step. This applies to exchanging the battery in an already registered, undamaged key—not adding or replacing the transmitter itself.
Can CR1616 replace CR1620?
No. Both are 16 millimeters in diameter, but the thickness differs. Use the exact CR1620 designation Honda specifies for this key and verify the removed cell.
What if the cover screw is stripped?
Stop before the head is destroyed. Do not drill beside the electronics or force a larger driver into it. A locksmith or key-electronics specialist can assess the fastener, shell and transmitter safely.
Can corrosion be cleaned during this job?
Visible leakage or corrosion changes this from routine battery service to electronics repair. Avoid sprays and abrasives; isolate the cell and have the key evaluated.
Where can I ask a Civic-specific question?
Use the Honda Civic chatroom and browse the Honda Civic repair-guide hub. Do not post key codes, registration documents or other security identifiers.
Sources, related guide and photo credit
- 2014 Honda Civic Sedan Owner’s Manual, Remote Transmitter Care, printed pages 401–402: CR1620 conventional-key procedure, small Phillips driver, cloth-wrapped small flat-tip driver, removal and polarity instructions; separate CR2032 smart-entry procedure.
- Duracell 1620 product page: one-pack availability, DL1620/CR1620 equivalence and coin-cell safety.
- US Consumer Product Safety Commission coin-cell safety center: ingestion danger and immediate terminal isolation for removed cells.
- STANLEY 66-344 exact screwdriver listing and STANLEY catalog specifications.
- Related guide: 2014 Civic sedan smart-entry remote CR2032 battery.
- Vehicle photo: Ghostofakina, Wikimedia Commons, CC BY-SA 4.0; source and license linked in the caption.