What is Reddit's opinion of Virhuck 2pcs Remote Control Helicopter Multicopter Spare Parts Lipo Life LiMn Li-ion Battery Monitor Alarm Low Voltage Buzzer Alarm Indicator 1S-8S Lipo Life LiMn Li-ion Battery Tester?

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Get a pack of these voltage checkers. They're cheap and do what you need them to do. I personally recommend never letting them drop below 3.2 volts per cell, otherwise you're simply inviting danger. If it drops below 3.0 you run the risk of them never charging again. One of the flaws of lipos, can't let them get too low or else you're fucked

Will 78.75 work for the blaster? I don't want to spend 60 dollars on a charger. (Not cheap according to me) Is this a good voltage alarm?https://www.amazon.com/Virhuck-Multicopter-Battery-Monitor-Alarm/dp/B072JSLP66/ref=sr_1_1?ie=UTF8&qid=1542555192&sr=8-1&keywords=voltage+alarm&refinements=p_72%3A2661618011 Why would I need a bag? I just store the batteries inside my blaster.

For now, I'm not going to worry about video. When you say OSD, do you mean something on my end to display video? Or do you mean something on the drone to read voltages? I thought I had to use something like THIS to beep to alert me when it's low, but yeah, I'd prefer it to read out on the LCD display on the RC controller... If that's what that screen is for??