*** Cells are not precharged 100% due to safety concerns and regulation from transportation authorities. Please fully charge the batteries before your first use or before storing them. Yuasa Enitime batteries are pre-chargeble. The ready to use technology is designed in Japan. Unlike regular rechargeable batteries, Enitime batteries have low-self discharge rate. Once fully charged, Enitime will retain 80% capacity after 1 year and ready to use at any time. Yuasa Enitime AA batteries provide superb amounts of clean, fresh energy to any device that uses AA batteries. Rechargeables save the environment because there is no need to throw them out when they are depleted. Ni-MH batteries such as these can be recharged fully or partially up to 1000 times without experiencing memory effect. Excellent for high drain devices such as digital cameras, game consoles, toys, audio cd players, etc. GS Yuasa Corporation has long been a leading manufacturer of motorsports batteries, and also makes premium, high-quality consumer rechargeable batteries. GS Yuasa was formed in 2004 by a merger between Yuasa Battery and Japan Storage Battery, to form one of the largest and most reliable manufacturers of all types of rechargeable batteries. Recommended to use with Hitech iC-108UL Smart Quick Charger (charger not included). Yuasa AA rechargeable batteries are also available in 2700mAh and 2100mAh capacity rating. Please visit our Storefront to view a complete line of Yuasa Ni-Mh AA and AAA batteries.