Promaster Casio NP-20 Lithium-Ion Battery For use with Casio - BRAND N – Camera Exchange
Batteries N Accessories BNA-WB-NP20 Digital Camera Battery - li-ion, 3.7V, 630 mAh, Ultra High Capacity Battery - Replacement for Casio NP-20 Battery - Walmart.com
Casio Battery NP-20 Li-Ion 650mAh BLI-216 – Battery World