This is a 1400mAh high capacity replacement battery. The higher the mAh rating, the more power a battery can store and the longer it will last per charge. It contains premium Japanese grade A battery cells and is guaranteed to outperform the Canon original battery. This battery is CE certified and built to meet or exceed the OEM specification. It is guaranteed to safely power all cameras that use the NB-1L / NB-1LH batteries. The lithium ion chemistry of this battery makes it 100% memory free. Unlike Nickel-Cadmium (Ni-Cad) batteries, lithium ion batteries don't have a "memory effect" which shortens their capacity. They can be partially charged and/or discharged without worry of shortened battery life. Are you concerned about protecting the environment? Do you worry about exposing your family to electronics containing hazardous heavy metals (such as lead or mercury)? You can rest easy knowing this battery is manufactured in accordance with the strict RoHS standards, which call for the Restriction of Hazardous Substances in electrical and electronic equipment. Unlike most aftermarket power supplies, our batteries have undergone rigorous cell cycle testing before leaving our factory. If a battery does not pass our benchmark testing for superior performance, it will be eliminated from the production line. This guarantees the best possible quality in all our batteries and virtually eliminates the chance of a product being shipped dead on arrival. This battery includes a 3-year warranty. Because we use premium Japanese cells and the highest quality components, we are confident that the battery will last the duration of the warranty and beyond. However, in the rare case where you experience a problem with the battery within the warranty period, it will be replaced promptly. Specs: 3.7V, 1400mAh, Rechargeable Li-Ion; Compatible with the following Canon cameras: PowerShot S100, S110, S200, S230, S300, S330, S400, S410, S500.