Acebird

Most on board monitors have a "safe/not so safe/don't fly" range of indication. I fail to see how adding a resistor would improve on this !!

My monitors have about 12 leds which, are divided into green, yellow and red sets! As mentioned before - twice - if I am in the green I fly. Any flier who adopts this practice should never get anywhere near the critical voltage drop off point!

Once you know your plane you get to know what duration your cells are good for and will also notice a drop off in duration. When it happens you know that it is time to replace the pack. (but I am anal and I log all my flights).

Always stick in the safe / green zone (or of you are really desperate for that last flight the safe/not so safe borderline is also OK).

I should have added that the monitor is not a substitute for good battery maintenence - my charger has a computer interface and I cycle my cells every 3 to 4 months and retain the graphical outputs for reference. However a lot of people do not have access to this type of gear!

What a lot of beginners do not realise is that there is a certain amount of discipline required in the hobby - eg good battery maintence and monitoring, safety , airworthiness checks on the aircraft etc etc - it is really not a plug and play hobby.