3 ms·

NowLight also relies on pulling though. The difference is just that you pull for a few minutes, instead of lifting something heavier for a few seconds, and then

• ZeroGravitas 5y ago
  I think this is the key difference, in the specs: .2V 3200mAh Lithium Iron Phosphate The slow descent was basically acting as a battery and they now use a battery instead. From the link someone else shared from the gravity light designers: > In 2009, a nascent industry had sprung up manufacturing and distributing small solar lanterns to serve the two out of three people without electricity access in Sub-Saharan Africa. The problem was that the photovoltaic panels and batteries that powered the products accounted for more than 60 percent of their cost. The expense of those two technologies compromised the efficacy of the products in emerging markets, pushing up their prices out of range for many of the people who needed them.