Launched in 2016, Little Sun Charge is a lightweight, easily portable handheld solar charger primary designed to charge mobile phones and other small USB-powered devices, such as MP3 players, cameras and e-readers. The product has an integrated solar lamp with three brightness levels and on a clear sunny day, a full charging during 7,5 hours offers 14 hours of bright light (75 lm), 45 hours at 25 lm, and over 150 hours at the lowest level (8 lm).
This device is engineered and manufactured by LittleSun GmbH in Berlin, Germany.
The product is manufactured by LittleSun GmbH in Berlin, Germany and shipped to its partners or local stores worldwide.
Intellectural Property Type
User Provision Model
Distributions to Date Status
There is no specific information about this product, however, for December 2017 LittleSun had distributed over 661,578 lamps worldwide, including their three models: Little Sun Diamond, Little Sun original and Little Sun Charger.
Power rating (W or kW)
System dimensions (m)
0.14 x 0.14 m
Lithium iron phosphate (LiFePO4) battery (2 V, 4400 mAh)
Battery capacity (mAh)
Description of solar panels
1 pcs, 2.5 W Monocrystalline Panel
Grid compatibility (yes/no)
Description of mobility
Yes, easily portable with its lanyard and carabiner hook and lightweight (324 g)
Design specifications include the weather and UV resistant body with an integrated monocrystalline solar panel (131 x 131 mm, 2,5 Wp, 4,4 V), a rechargeable Lithium iron phosphate battery (4400 mAh, 2V) and a LED light with 3 brightness settings (75 lm, 25 lm, 8 lm). It features a simple an intuitive bottom to check the charge level and activate the lamp within the 3 brightness options. This device's dimensions are 14 x 14 x 2,5 cm, it weighs 324 g and includes a handy lanyard and a carabiner hook that makes it easily portable. Further detail about design specification.
Manufacturer Specified Performance Parameters
LittleSun's main goal is to ensure energy access worldwide with the design and distribution of solar-powered solutions that have a positive impact in environmental sustainability and health (with the reduction of CO2 emissions), in local economies, and in gender equality. LittleSun has the commitment to provide solar lamps to children in off-grid locations for reading and homework purposes and solar-devices to charge mobile phones. They are also striving to provide better personal safety to women and girls after dark and with a special focus on refugee camps. Further information about their main goals and LittleSun's milestones.
Vetted Performance Status
Little Sun Charge requires 7.5 hours to fully charge. A fully charged device gives 14 hours of bright light (75 lm), 45 lightning hours at 25 lm and over 150 hours at lowest brightness level with 8 lm. This LED light has an optical efficiency of 167 lm/W at 5000 K (cool white).
There are no potential hazard or risks related to the use of this product.
Complementary Technical Systems
LittleSun GmbH also commercializes an on-stand, an extra and optional accessory that converts the Charge to a desk lamp, which costs 10 USD.
Academic Research and References
Compliance with regulations
Little Sun was honoured with the 2018 Billion Acts Hero Award in the Best Social Enterprise category that took place in Monaco. In April 2014, Little Sun received 5 million USD impact investment loan from Bloomberg Philanthropies, what is making it possible to scale up Little Sun’s operations across the African continent. They have participated in various media events.