Upgrade Your Old Flashlight With A 3v Led Conversion Kit Get Bright Instantly - Sports & Outdoors - Temu
Nite Ize LED Combo Upgrade Kit II LUC2-07 - The Home Depot
High Power LED Upgrade
Lumencraft LED Conversion Kit Compatible/Replacement for Maglite Flashlights, 325 Lumen, High Power SST40 + Scratch Resistant Glass Lens. Fits 2-6 D and C Cell Focusable (325 Lumen + Glass Lens) - Amazon.com