Question 1: I used KINREECELL Ni-MH batteries for my solar outdoor lights, but the lights did not last long.

The solar lights did not last long may owning to the battery did not well charged. Many factors contribute to poor charging:

Solar panel:

1. The solar panel must clean. The dust, rain water stains or dirty things are affecting the solar panel to charge the battery.
2. Aging solar panel are hard to get well charged even using good batteries. With low energy conversion rate, the batteries could get little energy, leading to a short working time. Another possible reason is a faulty between solar panel and the batteries. You can try to check and adjust the position of the battery.
3. Weather: Rainy or cloudy weather with poor solar energy will cause a short lighting time.
4. Season: Summer usually have more solar energy than winter days, a longer working time than winter. Furthermore, winter has lower ambient temperature, leading to a faster discharge speed, which may cause the solar lights work shorter time.
5. Place: The solar lights must be placed in the direct sunlight. In a place with much cover, like trees, walls, the solar panel will get less solar power and don't get full charge.

Question 2: What is the difference between AA 600mAh, AA800mAh, AA1000mAh and AA1300mAh?

• The number indicates capacity the battery holds. With higher capacity, the battery could be used for a longer period after being fully charged. For solar lights, whether the battery could get fully charged depends on the solar energy it can get. Sunlight in one day is limited, so 600-1300mAh is sufficient for the solar lights.