Li-Polymer Battery Rechargeable 3.7V 501220 90mAh
Summary of 3.7V 501220 90mAh
The 3.7V 501220 90mAh Li-Polymer cell is a compact, high energy density power source optimized for micro-devices. It boasts low self-discharge and extended cycle life due to its advanced chemistry, providing stable and reliable power. With an integrated protection circuit and OEM marking support, this battery guarantees safe and customizable integration.
Battery 501220 Technical Information
Model: 501220 Battery
Battery Type: Li Ion Polymer Battery 3.7 V
Nominal Capacity: 90mAh
Nominal Voltage: 3.7V
Energy: 0.333Wh
Energy Density: 104.06Wh/kg
Charge Cut-off Voltage: 4.2V
Discharge Cut-off Voltage: Typically 3.0V, Minimum 2.75V
Standard Charge Current: 0.2C (18mA)
Max Charge Current: 1C (90mA)
Standard Discharge Current: 0.2C (18mA)
Max Continuous Discharge Current: 1C (90mA)
Max Peak Discharge Current: 2C (180mA)
Internal Resistance: Less than 300mΩ
Cycle Life: More Than 500 Times
Dimensions: 5.0 × 12 × 20 mm
Weight: 3.2g
Charge Temperature Range: 0°C to 45°C
Discharge Temperature Range: -20°C to 65°C
Storage Temperature Range:
- -20℃~25℃: More than 12 months
- -20℃~45℃: Less than 3 months
- -20℃~60 ℃: Less than 1 month
Key Features – 501220 3.7 V Li-ion Polymer Battery
🚀 Ultra-High Energy Density for Maximum Runtime
The 501220 Li-Po battery features exceptionally high energy density, enabling designers to achieve longer operating time without increasing device size. Its advanced materials ensure efficient power storage in a miniature 12 × 22 × 5 mm footprint—ideal for compact electronics requiring long-lasting power.
📏 Compact 501220 Size — Small, Lightweight, Space-Saving
With its 501220 dimension profile, this battery fits devices where every gram and every millimeter matter. Its ultra-low mass and compact structure allow seamless integration into weight-sensitive designs.
Good choice for:
Micro trackers
Wearables
Smart cards
Compact medical gadgets
Lightweight consumer electronics
🔁 High Cycle Life — Over 500 Deep Cycles
The 3.7V 90mAh 501220 Li-Po cell is designed for longevity. Even after 500 deep charge–discharge cycles, the battery retains over 80% of its original capacity, ensuring long-term reliability.
🛡️ Integrated Protection Board for Safe Operation
The battery includes a built-in PCM/BMS protection board, offering essential electrical safeguards. These protections ensure safe usage in sensitive or unattended applications.
⛔ Over-charge protection
⛔ Over-discharge protection
⛔ Short-circuit protection
⛔ Over-current protection
🌙 Extremely Low Self-Discharge Rate (<1% per Month)
Designed with high-purity materials and optimized cell structure, the battery maintains stored power effectively. Ideal for low-duty or standby devices
🏷️ OEM Printing & Customization Available
We support OEM laser marking, labeling, and logo customization for manufacturers requiring branding or batch identification.
Available OEM options:
Model & voltage printing
Logo & date code
Custom wire length
Custom connectors
⚠️ Important Precautions for Safe Use
🔥 1. Not heat-resistant — avoid high temperatures
Do not expose the battery to 65°C or above, or direct sunlight. Long-term high temperature can cause swelling and reduce lifespan.
🚫 2. Not for high-power or power-tool applications
This is a non-power battery. Do not use it in devices requiring high current output.
🛑 3. For long-term storage
Keep battery at 40%–60% charge. Recharge once every 3 months.
🔋 4. Avoid over-charging and over-discharging
Such action risks immediate battery failure, significantly compromising lifespan and potentially leading to dangerous swelling.
🔌 5. Use CC/CV charging only
Always use a constant-current, constant-voltage lithium-ion charger to ensure safe and optimal charging performance.
❓ Frequently Asked Questions (FAQ)
Q1: What devices commonly use a 501220 Li-Po battery?
A: It is widely used in micro-electronics such as mini trackers, wearables, small medical devices, portable sensors, smart cards, and low-power IoT products.
Q2: How to charge li polymer battery?
A: Charge a Li-polymer battery with a compatible CC/CV (constant-current/constant-voltage) charger at the recommended voltage and current. Always monitor temperature and avoid overcharging for safety.
Q3: How to take care of li polymer battery?
A: Avoid overcharging, deep discharging, and exposure to high temperatures. Store it at around 50% charge in a cool, dry place when not in use to maximize its lifespan.
Q4: How to extend li-polymer battery life
A: Keep Li-polymer batteries between 20%–80%, avoid extreme heat, and use slow/standard charging to reduce cell stress.
Q5: Are you manufacturer or trading company?
A: Cestpower is a li polymer battery factory since 2010, we produce plenty of different li polymer battery models from 10mAh to 40Ah.
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