US Patent 11698184 Lighting device with rechargeable battery sandwich between printed circuit boards

A lighting module includes a first printed circuit board (PCB) with a push button switch and a charging port, a second PCB with a light emitting diode (LED), a rechargeable battery sandwiched between the PCB's, and ring disposed between the PCB's and surrounding the battery. A device including the lighting module, a body having a cavity with an aperture, and a cap having a protrusion facing the body. The lighting module received in the cavity, with the cap covering the aperture. The protrusion and push button switch are positioned such that when the cap is pushed inward near the protrusion, the protrusion pushes the push button switch and activates the lighting module. The cap further includes a ridge surrounding the protrusion on the outward side, the ridge preventing the protrusion from being pushed into the push button switch, unless the cap is pressed at approximately a location of the protrusion.