This is a lightweight Lithium Ion polymer battery, with a high energy density. It has a nominal output of 3.7v at 1200mAh and it enclosed with a standard 2-pin JST connector (with 2.0mm distance between the pins)
Not exactly what you're looking for? Consider alternatives to power your projects, such as Hydro Generators or different Lithium Ion batteries.
Measurements: 5x35x62 mm (thickness*width*length)
Note: Do not charge the 2U Lithium Ion Polymer 1.2 Ah battery with anything besides the specialized lithium polymer charger. The Battery includes a built-in protection against over voltage, over current and minimum voltage.