New here and hope I am doing this correctly. Have Trend Airshield Pro and unhappy with rechargeable batteries (seems to be a common complaint). Have read all the posts and answers here and will build replacement NiMH battery pack and get Tenergy smart charger (which seems to be out of stock everywhere at the moment). My question is - the Trend runs fine with battery pack out and charger plugged into the port on the back of the helmet. Other than the annoyance of being “tethered”, as one person here referred to it in older thread, is there any reason to not use it this way?
Sorry if this has been answered elsewhere, I did not see it...
thanks in advance
Jeff