Be the first to have the 4rd generation envelops the New Eneloop batteries are also rechargeable approximately 2, 100 times, an increase of approximately 20% compared to previous Eneloop batteries you need a battery, which is reliable even when having cold temperatures? before Eneloop was suitable for temperatures as low as -10a DegreeC - now even until -20a DegreeC. The New Eneloop is even more environment-friendly as it is pre-charged with solar energy in Japan. This product is manufactured in Japan.