The India-based Centre for Materials for Electronics Technology (C-MET) has designed and developed a graphene-based emergency lamp which can be fully charged in less than two minutes.
Commercially available emergency lamps rely on a battery which requires a minimum of three hours to get fully charged. Use of graphene-based supercapacitors, instead of the battery, reportedly ensures more life for the storage system of the lamp. It can be directly charged from the power supply in one or two minutes and provide light for up to 30-60 minutes. Another attractive feature of the lamp is its excellent power efficiency coupled with long operating life. It can also be charged from solar power, as was reported. C-MET has filed an Indian patent application for this technology.