Amazon.com: Synergy Digital Camera Battery, Compatible with Canon PowerShot A4000 is Digital Camera, (li-ion, 3.7V, 900 mAh) Ultra High Capacity, Replacement for Canon NB-11L Battery : Electronics
CANON CB-2LF BATTERY CHARGER (NB-11L)
Amazon.com : Wasabi Power Battery (2-Pack) for Canon NB-11L, NB-11LH : Electronics
CANON NB-11L BATTERY – AlineLk
Li-ion Battery for Canon NB-11L
Amazon.com : Original Genuine Canon CB-2LF Charger for PowerShot Camera NB-11L Battery [Non-Retail Packaging] : Electronics
Amazon.com : Canon 6212B001 NB-11L Rechargeable Li-Ion Battery Pack (Black) : Digital Camera Batteries : Electronics