Energizer CR2430 Batteries (3V Lithium Coin Cell)

The Energizer CR2430 is a 3V lithium manganese dioxide coin cell sized 24.5 mm × 3.0 mm. It balances a slim profile with meaningful capacity for key fobs, wearables, smart sensors, and compact instruments that need stable, predictable power.

Key Specs at a Glance

Attribute	Typical Value
Chemistry	Lithium manganese dioxide (primary, non-rechargeable)
Nominal voltage	3 V
Size	≈ 24.5 mm (diameter) × 3.0 mm (thickness)
Typical capacity	≈ 270–300 mAh (varies by brand, load, and temperature)
Use profile	Low-to-moderate drain; intermittent bursts (RF transmit, brief LEDs)

When to Choose CR2430

• Device specifies CR2430 in the manual or on the old cell.
• You need more runtime than 20 mm coins (CR2016/2025/2032) without increasing thickness much.
• Applications with long sleep and short wake cycles: key fobs, BLE tags, contact/leak sensors, digital thermometers, calipers, and mini meters.

Avoid or Consider Alternatives If

• The battery bay is 20 mm: use CR2032/2025/2016 as specified; 24.5 mm cells will not fit.
• You need longer runtime and the device accepts thicker cells: CR2450 (24.5 × 5.0 mm) or CR2477 (24.5 × 7.7 mm).
• You’re tempted to stack cells (e.g., two CR2016): do not stack—this risks damage and is unsafe.

Real-World Runtime Examples

• Key fob (a few presses/day): often 1–3 years.
• Door/window sensor (ping every 1–5 minutes): about 6–18 months.
• BLE beacon (advertising 1–2 s intervals): roughly 3–12 months.

Actual life depends on duty cycle, temperature, transmission power, and contact condition. Cold slows chemistry; high heat accelerates aging.

Compatibility & Equivalents

• IEC code: CR2430. Common cross-references include CR2430 and DL2430 (brand-specific prefixes may vary).
• Not interchangeable with smaller 20 mm coins (CR2016/2025/2032) or thicker 24.5 mm coins (CR2450/CR2477).
• Not the same as 1.5 V alkaline button cells (e.g., LR44) or rechargeable LIR/ML chemistries.

Buying Guide

• Single or twin pack: quick fixes and glovebox spares.
• 3–10 pack cards: households, clubs, and light office use.
• Dealer sleeves/inner cases: service benches, installers, and clinics (easier FIFO rotation, lower unit cost).
• Master case/bulk: facilities, IoT fleets, and campus maintenance programs.

Installation (2–5 minutes)

1. Confirm the code: CR2430.
2. Align polarity: the flat side is typically “+”; follow the device diagram.
3. Clean contacts: wipe gently with a dry, lint-free swab if tarnished.
4. Seat the cell flat, close firmly, and test immediately.

Storage & Safety

• Store cool, dry, and in original packaging. Mark receipt month/year; use oldest first (FIFO).
• Keep away from children and pets; coin cells are an ingestion hazard. If swallowed, seek immediate medical help.
• Do not recharge, puncture, or short-circuit. Do not carry loose with coins or keys.
• Recycle or dispose at approved collection points per local guidelines.

Troubleshooting

• No power after replacement: recheck size and polarity; ensure the cell sits flat.
• Intermittent operation: clean contacts; gently restore spring tension if bent.
• Still failing: perform device reset/re-pair; try a second fresh cell to rule out seating issues.

FAQ

Is any 3V coin cell the same as CR2430?

No. 3V describes voltage only. CR2430 is a specific size (24.5 × 3.0 mm). Always match the exact code.

Can I use CR2450 or CR2032 instead?

Only if the device explicitly supports them. CR2450 is thicker; CR2032 is smaller in diameter. Wrong sizes can damage contacts or fail to power the device.

How long will a CR2430 last?

From months to years depending on duty cycle, temperature, and device design. See the runtime examples above as a starting point.

Should I stock spares?

Yes. Keep at least one sealed spare for each critical device. For teams, use sleeves or inner cases and rotate stock (FIFO).

Is CR2430 rechargeable?

No. It is a primary (non-rechargeable) lithium cell. Use only once and recycle responsibly.