Ultrafire F13 at $11.39 - with Coupon Code - Gearbest

[Old-Lumens]

Some links for more info on the stock driver or mods.

https://budgetlightforum.com/t/-/26433

https://budgetlightforum.com/t/-/23188

https://budgetlightforum.com/t/-/19164

and the tear down video

UF F13