3.7V 2500mAh Rechargeable Battery Pack

Overview 

The 3.7V 2500mAh Rechargeable Battery Pack provides high energy density in a compact form factor. This battery is designed for reliability and longevity, featuring a stable discharge rate that is ideal for sensitive electronics. Most of our packs come with an integrated Battery Management System (BMS) protection board to prevent overcharging, over-discharging, and short circuits, ensuring your project (and your home) stays safe.

Key Features 

• Huge Capacity: 2500mAh provides significantly longer runtimes compared to standard 1000mAh or 1200mAh cells.

• Built-in Protection: Internal PCM/BMS circuit protects against over-charge ($>4.2V$) and over-discharge ($<3.0V$).

• Standard Connector: Usually equipped with a 2-pin JST-PH 2.0mm or JST-XH connector for “plug-and-play” use with many development boards.

• Lightweight Efficiency: Offers a much better power-to-weight ratio than NiMH or Lead-Acid batteries.

• Fast Charging: Supports standard 0.5C to 1C charging rates.

Technical Specifications 

Feature	Specification
Nominal Voltage	3.7V
Full Charge Voltage	4.2V
Capacity	2500 mAh
Chemistry	Lithium-ion Polymer (Li-Po) / Li-ion
Standard Discharge	0.2C
Max Continuous Discharge	1C (2.5A)
Operating Temp	-20°C to 60°C
Connector Type	JST-PH 2.0 / Pre-tinned Leads

Safety Warning 

• Use a Dedicated Charger: Only charge with a dedicated Li-ion/Li-Po charger (like the TP4056). Never use a standard DC adapter.

• Avoid Heat: Do not expose to temperatures above 60°C or direct sunlight for extended periods.

• Do Not Puncture: If the battery looks swollen (“puffy”), stop using it immediately and dispose of it safely.