Pentax D-LI109 Lithium-Ion rechargeable battery

Rechargeable Li-Ion Battery D-LI109 This is a small, efficient lithium ion (Li-Ion) battery. Please check your user's manual for specific compatibility with your PENTAX equipment. PLEASE NOTE: As with all Li-Ion batteries, never fully deplete your battery. Be sure to run your battery through a full charge cycle prior to it being fully discharged. Li-Ion batteries will achieve full operational efficiency after 10-15 charge cycles.