SDNP20 Lithium-Ion Battery - Rechargeable Ultra High Capacity (3.7V 630 mAh) - Replacement for Casio NP-20 Battery For Casio Exilim EX-M1, EX-M2, EX-S1, EX-S1 PM, EX-S100, EX-S2, EX-S2 PW, EX-S20, EX-S3, EX-S500, EX-S600, EX-S880, EX-Z3, EX-Z4U, EX-Z5, Replacement battery for the Casio NP20, Lithium-Ion (Li-ion) 3.7V (630mAh) This Synergy Digital battery is fully compatible with the original Casio NP20 Battery. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark