Delkin Devices DD/NP-40 (FUJI) Replacement Battery for Fuji NP-40 Replaces the Fujifilm NP-40 battery Also replaces the Pentax D-L18 battery 750 mAh capacity Quality replacement battery delivering high performance Compatible with Finepix F700, F402, F810, E550, and Pentax Optio S4, S4i, S, and SV models