Lipo Battery 805050 3.7v 2500mah Lithium Polymer Battery Elec-BT Speaker Rechargeable Battery

This 805050 polymer lithium battery is manufactured strictly with Grade A cells, guaranteeing a full actual capacity of 2500mAh with no overrated specifications, ensuring that your Bluetooth speaker or portable device receives genuine, lasting battery life. Its nominal voltage of 3.7V perfectly matches the power design standards of the vast majority of portable electronic products on the market, enabling plug-and-play use without additional voltage conversion.

In terms of cycle life, this cell performs exceptionally well: after 500 complete charge-discharge cycles, it still retains over 70% of its initial effective capacity, significantly outperforming the degradation levels of ordinary batteries. This means that even with daily charging and discharging, the device can operate stably for nearly one and a half years without noticeable battery aging, greatly extending the product's service life and reducing user replacement costs.

This battery is truly the perfect partner for portable Bluetooth speakers. When playing heavy bass or high-volume music, Bluetooth speakers require the battery to deliver instantaneous high current output. The 805050 battery supports a maximum continuous discharge current of 1C (2.5A), effectively preventing voltage sag that can cause audio distortion or Bluetooth disconnection.

Additionally, its 2500mAh capacity supports 6-10 hours of playback at medium volume, meeting the needs of outdoor gatherings or home use. Beyond speakers, this battery is widely applicable to various portable consumer electronic products, such as:

• PSP gaming consoles
• Handheld beauty devices
• GPS trackers
• Smart door locks
• Early education toys
• Portable POS terminals

Its standard 8mm thickness and 50mm square footprint easily fit into compact device enclosures, greatly facilitating miniaturized product design and making it an ideal choice for replacing or upgrading old equipment.

Safety is the core lifeline of any lithium-ion battery. This product features a highly reliable built-in PCM (Protection Circuit Module) that continuously monitors the battery's voltage and current status. In the event of overcharge (voltage exceeding 4.3V), over-discharge (voltage dropping below 2.4V), overcurrent (exceeding 3-5A), or external short circuit, the protection board disconnects the circuit within milliseconds.

More importantly, this battery adopts a pouch cell polymer safety structure, using aluminum-plastic film as the casing. Compared to traditional rigid cylindrical cells (such as 18650s), pouch cells only bulge and deform under extreme fault conditions (e.g., internal short circuit or overcharge) rather than exploding. Even under extreme nail penetration tests, they only emit smoke without catching fire. This design greatly enhances the safety of electronic products, making them particularly suitable for devices carried close to the body.

To accommodate different geographical and seasonal usage environments, this battery offers excellent high and low temperature adaptability. In freezing -20℃ conditions, it can still activate and maintain over 60% of its discharge capacity, ensuring that outdoor Bluetooth speakers or vehicle-mounted devices won't fail in winter.

In high-temperature 50℃ environments, the capacity retention rate still exceeds 85%, withstanding the heat challenges of closed vehicle cabins in summer or prolonged high-power discharge. Furthermore, its charging efficiency is extremely high, typically exceeding 95%. Combined with 0.5C (1250mA) fast charging capability, the full charge time can be reduced to approximately 2.5 hours.

Due to the very low internal resistance of the polymer electrolyte, the heat generated during charging is significantly less than that of ordinary batteries, reducing energy waste and preventing charging-induced overheating that could accelerate aging of the device housing or other electronic components.