Lightweight rechargeable Lithium Ion polymer battery, with a high energy density. Enclosed with a standard 2-pin JST connector with 2 mm distance between the pins. (800 mAh).
Not exactly what you're looking for? Consider alternatives to power your projects, such as Hydro Generators or different Lithium Ion batteries.
Measurements: 7x27x50mm (thickness*width*length)
Note: Do not charge the 2U Lithium Ion Polymer 800 mAh battery with anything besides the specialized lithium polymer charger. The Battery includes a built-in protection against over voltage, over current and minimum voltage.