10 of 10 people found the following review helpful
This review is from: Duracell Pre Charged Rechargeable 2400mAh AA Batteries--Pack of 8 (Personal Care)
These are most probably re branded eneloop batteries, originally developed by Sanyo now being produce by Panasonic. They are pre-charged to around 75% at the factory.
Performance is top notch and ideal for high drain devices such as flashguns. I suggest using a quality charger for these batteries rather than dumb chargers to maximise battery life. I generally use Maha, Technoline and La Crosse chargers as these will monitor each individual cell during charging, hence they will prevent overcharging. Other good quality chargers are also available.