Crazy Cable NB6L High Performance Replacement Battery for Canon NB-6L (1150mAh, fits for: Canon PowerShot S120 / SX170 IS / SX240) (Accessories)
While the batteries cost only one-third of the originals, but bring less than a third of the power. If they are charged a few days, the performance is very fast in the basement. The originals have in video mode still capacity for approximately 1 hour