BTECH? They sell their Baofengs as private labeled BTECH brand. You pay more, but get no more in quality. Warranty on an impulse buy $20 item is not worthwhile because the shipping to claim the warranty is half the cost of the new item, especially if you have to return it a couple times. On such cheap items, I'd just as soon roll the dice and understand "no warranty" from direct Chinese sellers. Most Baofeng radios work out of the box.
BTW, never buy a BTECH mobile radio. They are all shit. Everyone I know that ever bought one sent them back and those that I hear still trying to use them are near unintelligible on the air.
georgel might give his review of the BTECH mobile radios and compare it to buying and using Yaesu after trying the BTECH.