 Its increased tolerance to modest overcharging (compared to other Li cell types) means that can be connected to photovoltaic cells without circuitry to halt the recharge cycle.The ability to drive an LED from a single LFP cell also obviates battery holders, and thus the corrosion, condensation and dirt issues associated with products using multiple removable rechargeable batteries.By 2013, better solar-charged passive infrared security lamps emerged.