GearBest offers the Nitecore Cree LED Keychain Light in Silver or Red for $20.93. Coupon code "TIPCDEAL" cuts it to $16.99. With free shipping, that's the lowest price we could find by $8. It features three brightness levels, turbo mode, and rechargeable 500-mAh battery.

Note: This item ships from China and may take up to six weeks to arrive.