Never tested the difference in timed useage, but everyone knows the 18-200mm lens chews through battery life. Ive not had any issues and battery charge seems to last as long as origonal samsung battery. I got mine from bestbatt.com
BBBP1030Samsung ED-BP1030 BP1030 Li-Ion Rechargeable Digital Camera Battery2$10.75$21.50BBBP1030CHGNew Charger for Samsung ED-BP1030 BP1030 Digital Camera Battery1$17.50$17.50 Subtotal: $39.00 Tax: $0.00 Shipping Cost: $8.52 Grand Total: $47.52
Thats what I got.