storage at 20°C. Eneloop Lite 1st generation The Eneloop Lite line was released in Japan in June 2010. They addressed two disadvantages of alkaline and other NiMH batteries: the initial cost and the long charging time—both achieved by reducing the capacity of the battery. The batteries find suitable applications in low-drain devices such as remote control devices and alarms, where low capacity is not an issue. The AAs have 1,000 mAh of capacity, while the AAAs have 600 mAh. Due to reduction of the capacity compared to the regular Eneloop cells, the charging time is halved for the AA and reduced by 25% for the AAA. On the other hand, they can be recharged 3,000 times. The reduction in capacity also reduced the production cost, which decreased the initial investment for rechargeable batteries. They also weigh 30% less. The product numbers are HR-3UQ (AA) and HR-4UQ (AAA). 2nd generation Along with the upgrade of the regular Eneloop cells in April 2013, the Lite version was also upgraded. According to Panasonic, it can now be recharged up to 3,000 times (life cycles for DOD 60%) (model numbers BK-3LCC for the AA and BK-4LCC for the AAA battery). The upgraded batteries also retain 90% of the charge after one year like the regular Eneloop cells. Eneloop Pro (Eneloop XX) The Eneloop Pro family have higher capacity in mAh, trading this off against poorer charge retention and shorter lifespan. They are better than standard Eneloops for high-drain applications. They are not recommended for applications where batteries are continuously charged, such as in DECT phones left on a charging base. Their higher self-discharge rate makes them unsuitable for very low drain applications such as clocks. Their slightly larger diameter can be problematic where the batteries are a tight fit. 1st generation The Eneloop Pro (or XX powered by Eneloop Technology in the US, Canada, and Europe) series was introduced in 2011. At that time, no AAA version was produced. They have a higher capacity than regular Eneloop cells, 2,500 mAh (min. 2,400 mAh) for AA. They retain 75% of their initial charge after one year, and can be recharged 500 times, significantly less than the standard non-Pro Eneloop line. The product numbers are HR-3UWX (AA) and HR-3UWXA (AA). 2nd generation In January 2013, Sanyo announced the second generation of Eneloop XX (model HR-3UWXB, or Panasonic BK-3HCC), branded Eneloop Pro. The new generation has a