Lithium Ion Polymer Battery 4025180 3.7v 2200mAh 8.14wh Rechargeable Li-ion Battery Cell

Advantages:

1. Size and Form Factor Advantages: Ultra-thin Design, Fits into Compact Spaces

The model number "4025180" represents the lithium battery's thickness (4.0mm) x width (25mm) x length (180mm), making it a typical "ultra-thin, long strip" polymer battery.

Ultra-thin: At 4.0mm, the thickness is significantly thinner than traditional cylindrical lithium batteries (e.g., the 18650 battery has an 18mm diameter). This allows it to be embedded in thickness-sensitive devices such as laptop keyboards, smart bracelets/watch bands, and ultra-thin tablets, without taking up additional space.

Strip Form Factor: The 180mm length allows it to flexibly fit into narrow, unused areas within devices (e.g., the bezel of an e-book reader or the sides of a wireless headphone charging case), improving device space utilization and helping manufacturers achieve thinner and lighter product designs.

2. Electrochemical Performance: Compatible with Mainstream Consumer Devices

Voltage Compatibility: 3.7V is the "standard operating voltage" for polymer lithium batteries, consistent with the motherboard power requirements of most consumer electronics (such as mobile phones, tablets, and Bluetooth devices). This eliminates the need for additional voltage conversion modules, reducing device circuit complexity.

Capacity and Energy Density Balance: 2200mAh (corresponding to 8.14Wh of energy, calculated as: 3.7V × 2.2Ah = 8.14Wh) is considered "medium capacity." Combined with its ultra-thin size, its energy density (energy per unit volume) surpasses that of cylindrical or prismatic steel-cased batteries of similar thickness, meeting the battery life requirements of devices requiring "1-2 days of typical use" (e.g., approximately 7 days for a smart bracelet or 8 hours of playback for a Bluetooth speaker).

Charge and Discharge Stability: Polymer lithium batteries typically have a low internal resistance (typically <100mΩ), generate minimal heat during charge and discharge, and support a typical charge rate of 0.5C-1C (i.e., 1.1A-2.2A, approximately 1-2 days). Fully charged in 12 hours), the battery life can reach 300-500 cycles (capacity decays to less than 80%), meeting the "1-2 year use cycle" requirement for consumer devices.

3. Safety and Reliability: Reduced Risk

Structural Safety: Polymer lithium batteries are encapsulated in an aluminum-plastic film (rather than a steel/aluminum shell) and contain no liquid electrolyte (or only a small amount of gel electrolyte). Even if squeezed or punctured, they are unlikely to leak or explode; at most, they will bulge, making them far safer than traditional liquid lithium batteries.

Environmental Adaptability: The operating temperature range is typically -10°C to 60°C, making them suitable for everyday indoor and outdoor environments (such as using Bluetooth devices outdoors in summer or smartwatches in cold winter temperatures). Low-temperature discharge performance is superior to cylindrical batteries (capacity decay is reduced at low temperatures).

4. Design Flexibility: Customizable

The polymer lithium battery packaging can be fine-tuned to meet device requirements (e.g., the thickness can be adjusted to 3.8mm and the length to 175mm based on the 4025180 package). A protection board (to prevent overcharging, over-discharging, and short circuiting) can also be integrated, eliminating the need for manufacturers to design additional protection circuitry and shortening product development cycles.