Adafruit Lithium Ion Battery Pack - 3.7V 4400mAh

Need a big battery for your project? This lithium-ion pack boasts a substantial 4400mAh capacity, crafted from two 2200mAh cells connected in parallel, spot-welded to a protection circuit. Built-in over-voltage, under-voltage, and over-current protection ensures safe operation.

Each cell outputs 1A of current for around 4 hours, making the total peak current slightly over 1.5 Amps. It's recommended to keep any constant current draw below 1A to optimize lifespan. The color-coded wires and included JST 2-pin cable allow easy connectivity with compatible chargers, while the cable's 2A rating supports safe usage.

To recharge, use a LiIon/LiPoly constant voltage/current charger at a rate of 0.5C (2.2A) or less. It's advisable to charge at 0.25C or lower for enhanced safety. Avoid using NiMH/NiCad/lead-acid chargers, shorting, bending, crushing, or puncturing the batteries.

Note that the batteries lack built-in thermistors, so cautious charging is imperative. Match polarity with Adafruit LiPoly/LiIon chargers to avoid damage. For expert users only, these power packs require diligent inspection to prevent short circuits and ensure top performance.