In the article , “Recycling old car batteries into solar cells,” professors Angela M. Belcher and four graduate students presented the advantage of using lead to recycle by perovskite technology. The first advantage of using lead can reduce toxic material from landfills and reuse it in photovoltaic panels. The second benefit of recycled lead can reduce temperature and the number of step in the manufacture of solar cells. The third batteries technology is undergoing fast change with new, more efficient types which 90 percent of the lead recovered from the recycling of old batteries is used to produce new batteries. Finally, the author believes that recycled perovskite solar cells will be supported by the other photovoltaics researchers who can develop the technology for maximum efficiency from old batteries to produce perovskite solar cells. In conclusion , the perovskite technology recycled lead from old batteries can make lots of benefits.