Flashlights, lanterns and road flares are considered rechargeable because the “secondary” battery used to power the device, generally NiMH or Lithium, can recharge many times. Charging and discharging batteries involve redox chemistry. … Oxidation occurs at the anode while reduction occurs at the cathode. Recharging a battery involves the conversion of electrical energy to chemical energy.
LED Flashlights, Headlamps, Lanterns