The CR1620 is a 3V lithium manganese dioxide (Li-MnO?) coin cell battery found in key fobs, calculators, medical devices, and CMOS memory backup. When it fails, finding the right equivalent involves matching physical dimensions (16mm diameter × 2.0mm height), voltage (3V), and capacity (∼70mAh). This guide covers direct replacements, cross-compatible alternatives, and critical selection factors to ensure your devices stay powered reliably.

Direct CR1620 Equivalent Models

These batteries match the CR1620’s specifications exactly and are true drop-in replacements:

· CR-1620/BN (Panasonic): Identical specs; compliant with RoHS/Reach standards. Widely used in automotive keys and electronics.

· 6620101501 (VARTA): 70mAh capacity, 3V output, and identical dimensions. Ideal for industrial applications like sensors.

· DL1620, ECR1620, GPCR1620: Branded equivalents from Duracell, Energizer, and GP. Verify capacity (≥70mAh) and temperature range (-30°C to 60°C).

?? Pro Tip: Always check for "CR1620" or "1620" in the model number—this confirms dimensional compatibility.

 

Size-Compatible Alternatives (With Caveats)

If exact equivalents are unavailable, these options may fit but require evaluation:

Battery Model	Dimensions (mm)	Capacity	Compatibility Notes
CR1616	16 × 1.6	∼50mAh	Thinner; fits slots with spring contacts. Capacity is 30% lower—expect shorter life.
CR1632	16 × 3.2	∼120mAh	Same diameter but thicker. Only fits if the compartment has >1.2mm extra height. Higher capacity extends service life.

Real-World Example: Honda/Acura key fobs designed for CR1616 often accept CR1620 or CR1632. Upgrading to CR1620 extended battery life from 1.5 years to 3+ years in user tests.

 

Electrical Equivalents (Same Voltage/Capacity, Different Size)

These 3V batteries share electrical specs but differ in size—use only with adapters or modified holders:

· CR2016 (20mm × 1.6mm): Matches voltage/capacity but larger diameter. Requires spacer for secure contact.

· CR2032 (20mm × 3.2mm): Higher capacity (∼225mAh). Ideal for power-hungry devices if physical fit is addressed.

?? Warning: Never force-insert ill-fitting batteries—risk short-circuiting or damaging contacts!

 

Key Selection Criteria for CR1620 Replacements

Capacity & Lifespan:

o Standard CR1620: 70mAh (lasts 1–3 years in key fobs).

o Premium brands (Panasonic, VARTA) offer up to 170mAh—verify datasheets.

Temperature Resilience:

o Ensure operation within -30°C to 60°C for automotive/outdoor use.

Certifications & Safety:

o Prioritize RoHS-compliant, mercury-free cells.

o Avoid non-compliant batteries lacking over-discharge protection.

Brand Variance:

o Renata, Maxell, and Sony produce equivalents with minor weight (1.2g vs. 1.3g) or lifecycle differences (e.g., "End of Life" vs. "Active").

 

Application-Specific Recommendations

· Car Key Fobs (e.g., Mazda, Honda): Use CR-1620/BN or CR1632 for extended longevity.

· Motherboard BIOS/CMOS: Stick to exact CR1620 specs—voltage spikes risk data loss.

· Wearables & Sensors: Opt for heat-resistant Li-MnO? variants for stable performance.

 

Final Tips for Choosing the Right Equivalent

· Confirm physical fit: Measure compartment height—even 0.5mm matters!

· Check expiration dates: Lithium coin cells lose 1–2% capacity annually. Use freshest stock.

· When in doubt: CR-1620/BN (Panasonic) or VARTA’s 6620101501 are safest 1:1 swaps.

?? Did You Know? Storing CR1620 batteries at 15–25°C extends shelf life to 10 years! Avoid humidity to prevent corrosion.

By matching size, voltage, and context-specific needs, you can seamlessly replace CR1620 batteries without compromising device integrity. When alternatives are used strategically (e.g., CR1632 for higher capacity), they can outperform the original—proving that smart equivalency is more than just a specs game.

 

CR1620 Battery: Frequently Asked Questions (FAQ)

Q1: What does "CR" in CR1620 mean?

A: The prefix indicates chemistry and shape:

· C: Lithium chemistry (Li-MnO?)

· R: Round (coin/button cell)

· 1620: 16mm diameter, 2.0mm height.

Q2: What are direct CR1620 equivalents?

A: These models match specs exactly (3V, 70mAh, 16×2.0mm):

· Panasonic CR-1620/BN

· VARTA CR1620 (or 6620101501)

· Duracell DL1620, Energizer ECR1620, GP GPCR1620

?? Note: Always verify voltage (3V) and dimensions before purchasing.

 

Q3: Can I use a CR1616 or CR1632 instead?

A: Proceed with caution:

· CR1616 (16×1.6mm): Thinner; may fit if contacts are spring-loaded. Downside: 30% lower capacity (50mAh).

· CR1632 (16×3.2mm): Same diameter but thicker. Only works if the compartment has >1.2mm extra height. Upside: 120mAh capacity (longer life).

 

Q4: Is CR2032 compatible with CR1620?

A: No—CR2032 is 20mm wide (vs. CR1620’s 16mm). Forcing it risks:

· Damaging battery contacts

· Short-circuiting

· Device malfunction
Exception: Use only with a spacer/adapter if the compartment allows.

 

Q5: How long does a CR1620 last?

A: Lifespan depends on:

· Capacity: Standard = 70mAh (premium brands: up to 170mAh).

· Usage:

o Key fobs: 1–3 years

o CMOS backup: 5–10 years

o Active devices (e.g., thermometers): 6–18 months
Tip: Check expiration dates—lithium cells lose 1–2% capacity/year in storage.

 

Q7: What’s the voltage of CR1620? Can I use 1.5V batteries?

A: 

· Voltage: 3.0V (nominal).

· Never use 1.5V batteries (e.g., alkaline LR44)! Low voltage may:

o Cause device failure

o Corrode contacts due to chemistry mismatch.

 

Q8: How to install CR1620 correctly?

A: Follow polarity markings:

· "+" side up (visible, usually with text/logo) in most compartments.

· "-" side down (smooth metal face).
Warning: Reversing polarity can damage devices!

Q9: Are CR1620 batteries rechargeable?

A: No—CR1620 is primary (non-rechargeable). Attempting to recharge it may cause:

· Leakage

· Overheating

· Explosion
For rechargeable needs, seek Li-ion alternatives (e.g., LIR1620), but confirm voltage compatibility.

 

Q10: How to store CR1620 batteries?

A: Maximize shelf life with:

· Temperature: 15–25°C (avoid heat/humidity)

· Container: Original packaging or non-conductive case

· Avoid: Metal contact (coins, keys) to prevent short-circuiting.
Shelf life: Up to 10 years when stored properly.

 

Q11: How to dispose of CR1620 safely?

A: 

· Do NOT incinerate or toss in household trash.

· Recycle at designated centers (look for ?? symbol).

· Tape terminals with non-conductive tape before disposal.

 

Q12: Why does my new CR1620 battery not work?

A: Troubleshoot:

1. Check polarity (+/- orientation).

2. Clean contacts (rubbing alcohol removes corrosion).

3. Test voltage with a multimeter (<2.7V = depleted).

4. Verify compatibility—some devices require exact models (e.g., BIOS chips).

 

Q13: Are "no-name" CR1620 batteries safe?

A: Risky—uncertified brands may:

· Lack over-discharge protection

· Use inferior electrolytes (leakage risk)

· Have inflated capacity claims
Recommendation: Stick to brands like Panasonic, VARTA, or Energizer.

 

Q14: Can extreme temperatures damage CR1620?

A: Yes. Operating range: -30°C to 60°C. Beyond this:

· Cold: Voltage drops, reducing efficiency.

· Heat: Accelerates self-discharge; risk of leakage.

 

Q15: Where to buy authentic CR1620 batteries?

A: Trusted sources:

· Electronics retailers (Best Buy, Microcenter)

· Automotive stores (for key fobs)

· Online: Official brand stores on Amazon/Newegg
Red flags: Prices significantly below market rate or missing expiration dates.

Pro Tip: Renata CR1620 (Swiss-made) includes bitter coating to deter swallowing—ideal for homes with children.

 

Final Note: When in doubt, consult your device’s manual or manufacturer. Using verified equivalents ensures safety and extends device longevity!

 

 

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