Description
>> STOP FEEDING YOUR BENCH DISPOSABLE COINS. <<
Every RTC module, every sensor node, every little board with a coin cell holder eats CR2032s like quarters in an arcade cabinet. Drain it, toss it, buy another pack. Repeat until the drawer is full of dead silver discs.
The Rabbit-Labs LIR2032 is a rechargeable lithium-ion coin cell in the standard 2032 form factor. 3.6V nominal. Rechargeable to 4.2V. Hundreds of cycles. Charge it, run it, charge it again.
Know your voltage. This is not a drop-in replacement for every CR2032 slot. A standard CR2032 runs at 3.0V. An LIR2032 runs at 3.6V nominal and up to 4.2V fresh off the charger. That extra headroom is exactly what devices designed for rechargeable coin cells want, and exactly what can damage devices built only for 3V primary cells. Check your device before you drop one in.
Built for builders. For boards and modules designed around rechargeable coin cells or with an onboard LIR charging circuit, it’s clean, stable backup power you never have to throw away.
Key Specs:
- Type: LIR2032 rechargeable lithium-ion coin cell
- Nominal Voltage: 3.6V
- Max Charge Voltage: 4.2V (CC/CV)
- Capacity: approx. 40mAh
- Standard Charge Current: approx. 0.5C (20mA)
- Max Charge Current: approx. 1C (40mA)
- Max Discharge Current: approx. 40mA
- Discharge Cutoff: 2.75 to 3.0V
- Cycle Life: 500 cycles or more at 80% capacity
- Charge Temperature: 0 to 45°C (32 to 113°F)
- Discharge Temperature: -20 to 60°C (-4 to 140°F)
- Dimensions: 20 mm diameter x 3.2 mm (0.79 x 0.13 in)
- Weight: approx. 2.8g (0.1 oz)
- Transport Testing: UN38.3 tested, ships at approx. 30% charge
Applications that matter:
KIISU. This is the battery that the KIISU demands. Don’t use a regular CR2032!
RTC & Backup Power. Real-time clock modules and backup circuits designed for rechargeable coin cells keep time through power loss, and recharge themselves when main power returns.
Flipper Zero GPIO Add-Ons. Compatible Flipper Zero add-on boards with LIR2032-rated coin cell holders.
IoT & Sensor Nodes. Low-current sensors and beacons designed for 3.6V rechargeable coin cells.
Custom Electronics. Wearables, badges, and prototypes where you’ve designed in an LIR2032 holder and a proper charging circuit.
Charge it. Run it. Charge it again.
▌README.TXT – INSTRUCTIONS FOR USE
Compatibility: The LIR2032 is a 3.6V rechargeable lithium-ion coin cell. It fits standard 2032 holders but runs at a higher voltage than a 3V CR2032. Only use it in devices designed for LIR2032 cells or rated for 3.6 to 4.2V. Do not use it in devices built only for 3V CR2032 primary cells, such as most car key fobs, remote controls, and computer motherboard CMOS sockets, unless the device manufacturer approves it.
Step 1: Open Safely The cell ships in a sealed pouch that must be torn open. Open it only when you are ready to install the cell, and keep the cell and its packaging away from children at all times.
Step 2: Check Your Device Confirm your device supports 3.6V rechargeable coin cells. If you are not sure, check the manufacturer’s documentation before installing.
Step 3: Charge First The cell ships at approximately 30% charge. Charge it fully before first use with a charger designed for LIR2032 lithium-ion coin cells (CC/CV to 4.2V). Never use a charger designed for any other battery type.
Step 4: Install Install with correct polarity: the flat face marked (+) faces the positive contact in your holder.
Step 5: Recharge Recharge when your device reports low battery or stops working. Do not leave the cell fully discharged for long periods.
Step 6: Store Store spare cells in their original packaging or an insulated battery case, out of reach of children, in a cool, dry place at partial charge.
PRO TIP: If your board has no onboard charging circuit, the LIR2032 won’t recharge in place. Pull it, top it up on a dedicated coin cell charger, and swap it back. Keep a charged spare and you’ll never lose your RTC time.
▌DEBUG LOG – TROUBLESHOOTING
ISSUE: Device doesn’t power on. FIX: Check polarity first. Then charge the cell, since it ships at about 30%. Confirm your device is rated for LIR2032 or 3.6V coin cells.
ISSUE: Cell won’t hold a charge or runs down fast. FIX: Make sure your charger is designed for LIR2032 lithium-ion coin cells and charges to 4.2V. Coin cells have very small capacity, so high current draw (radios, LEDs, displays) drains them quickly. A cell left fully discharged for a long time may lose capacity permanently.
ISSUE: Device behaves erratically or shows errors after installing. FIX: The device may not tolerate the LIR2032’s higher voltage. Remove the cell immediately and go back to the battery type the manufacturer specifies.
ISSUE: Cell doesn’t recharge in my device. FIX: Your device has no charging circuit for coin cells. Charge the cell on a dedicated LIR2032 charger instead.
ISSUE: Cell is swollen, leaking, or hot. FIX: Stop using it immediately. Tape over both faces with non-conductive tape, keep it away from children, and take it to a battery recycling drop-off.
▌SYS.WARN – WARNINGS, HAZARDS & DISCLAIMERS
WARNING: Ingestion Hazard. DEATH or serious injury can occur if ingested. A swallowed button cell or coin battery can cause internal chemical burns in as little as 2 hours. KEEP new and used batteries OUT OF REACH OF CHILDREN. Seek immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body. National Battery Ingestion Hotline: 1-800-498-8666. Poison Control: 1-800-222-1222.
Used Batteries. Remove and immediately recycle or dispose of used batteries according to local regulations, and keep them away from children. Even used batteries may cause severe injury or death. Do NOT dispose of batteries in household trash or incinerate.
Voltage. LIR2032 cells run at 3.6V nominal and up to 4.2V when fully charged, higher than a standard 3V CR2032. Using them in devices not rated for this voltage can damage the device.
Charging. Charge only with a charger designed for LIR2032 lithium-ion coin cells, at no more than 4.2V. Never attempt to recharge non-rechargeable CR2032 or other primary batteries. Charge at 0 to 45°C, on a non-flammable surface, and do not leave cells charging unattended.
Lithium Battery Hazard. Lithium-ion batteries can catch fire, vent, or explode if punctured, crushed, short-circuited, overcharged, or overheated. Do not puncture, crush, disassemble, heat above 60°C (140°F), incinerate, or expose to water.
Short Circuit. Do not short circuit. Keep cells away from coins, keys, and other metal objects. Store in original packaging or an insulated case.
Polarity & Mixing. Always install with correct polarity. Do not mix rechargeable LIR2032 cells with non-rechargeable CR2032 cells, or old cells with new, in the same device.
Damaged Cells. Do not use damaged, swollen, or leaking cells. If contact with battery contents occurs, wash immediately with soap and water and seek medical attention if irritation persists.
Shipping Restrictions. Lithium-ion cells sold without equipment are regulated as hazardous materials. This item ships only to addresses in the 48 contiguous United States, by ground service. It cannot be shipped internationally, by air, or to Alaska, Hawaii, or US territories.
Transport Certification. This cell is UN38.3 tested and is shipped at approximately 30% state of charge in line with IATA and US DOT lithium battery shipping regulations. The UN38.3 test summary is available upon request to authorities, carriers, and other parties with a legitimate need.
Disposal. Do not dispose of in household trash or fire. Tape over both faces with non-conductive tape and recycle at a battery collection or drop-off point in accordance with local regulations.
Disclaimer. This product is sold “as-is” for use by qualified individuals. No express or implied guarantee of compatibility with any device is made. Rabbit-Labs LLC is not responsible for damage resulting from use in devices not rated for LIR2032 cells, improper charging, or misuse. Rabbit-Labs LLC makes no warranty, express or implied, regarding fitness for a particular purpose. Maximum liability shall not exceed the purchase price of the product.
© Rabbit-Labs LLC. All rights reserved. The Rabbit-Labs name and logo are trademarks of Rabbit-Labs LLC. Flipper Zero is a trademark of Flipper Devices Inc. Rabbit-Labs is not affiliated with or endorsed by Flipper Devices Inc.
