This LED flashlight bulb is an economical choice for a back-up bulb for most flashlights. This bulb lasts more than 300 times longer than standard Krypton Xenon or Halogen bulbs while also providing greatly increased battery life and higher-quality white light that allows you to see better at night.
In addition to a brighter lumens, the bulb is multi-power conversion bulb for 1 to 6-cell flashlights, offers an easy way to convert many standard flashlights into LED flashlights.
1.Built-in a constant current LED driver
These high-intensity LED flashlight bulbs are set inside high efficient LED constant current drivers to ensure full electricity transmission. They are universal for 1 to 6 cells (1-9V), and assure brilliant white light even when batteries are low.
2.With a function of "TACP" (Temperature Auto Control Power)
The output power of bulb's driver will be controlled automatically according to different working temperatures.
3.Reverse polarity protection or non-polarity（Optianal）
Reverse polarity protection means that if the contacts are connected in reverse the LED will now light but no damage will be done and it will work when the polarity is corrected.
Non-polarity means that flashlights will still work even if the contacts are connected in reverse.