Kruta 1600mAh Large Capacity Ni-MH Rechargeable Solar AA Batteries for Outdoor Solar Lights, Pre-charged and low self-discharge aa battery About Kruta: Kruta is a professional brand manufacture that produces Kruta series general use batteries, such as Ni-MH rechargeable aa battery, aa/aaa solar battery , Various types of cordless phone batteries (BT162342 ,BT183342, BT1021,BT18433) . Battery Specifications: Capacity: 1600mAhVoltage: 1.2VChemistry: NiMHCycle Life: 1200Working Temperature:-4°F to 122°F degreeDoesn't contain Hg/Cd/Pb, no pollution to the environment. Widely Use for your Everyday Devices: Kruta 1600mAh rechargeable AA batteries can be used for outdoor solar lights and other everyday devices like battery string lights, TV remotes, wireless mouses, game controllers electronic toys, and so on.Using rechargeable NiMH batteries that can be constantly recharged and reused, spend less money on one-time-use disposable batteries, do less harm to the environment. Using Tips for Rechargeable AA Solar Battery Question 1: I just order new Kruta rechargeable aa solar battery, why the battery is not working ? For safety shipment, all rechargeable batttery only have been charged for about 40% power. So please kindly charge battery by battery charger before use. Please kindly checking if your solar lights has any problem before order battery and clean your solar lights, especially for battery compartment and solar pannel. Please checking if your installed battery correctly and see if your solar battery compartment loose and rusty.If solar light not working after install battery and your solar battery compartment no issue, please try to use our battery on other devices, like remotes, alarm clock or toys, if other devices working, it means your solar light has issues. Question 2: I used Kruta Rechargeable AA Battery on my solar light, but the light 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: 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.Weather: Rainy or cloudy weather with poor solar energy will cause a short lighting time.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.Place: In a place with much cover, like trees, walls, the solar panel will get less solar power and don't get full charge.If Solar light battery compartment loose, the battery will could not be charged well. Battery charger: bad battery charger charging current and Charging efficiency is very low, they can not charge battery fully even charged long time. Widely Use Kruta Rechargeable AA Battery for Many Home Devices