The is the Rechargeable Lithium-Ion Battery D-L109 from Pentax for their KR digital SLR camera. Small and lightweight, Lithium-ion batteries can be charged or discharged at any time without developing memory effects.
Use With D-BC109 Charger
Specifications:
Chemistry Lithium-ion Capacity 7.4V Output Voltage 7.4V (approx) Dimensions 2.2 x 1.4 x 0.6" (56.6 x 36.1 x 14.4mm) Weight 2 oz (57g)