Brolin McKay wrote:
You're not wrong but I want to STRONGLY caution any of yall that doing this would void any warranty on your unit and could end up completely "bricking" it if the voltage/amps are wrong. These batteries are tested to ensure that there is zero safety hazards when in use, but if you install a different battery we can't guarantee that same level of safety or performance.
Do so at your own risk!
I've considered voiding my 740's warranty that way, too. What bothers me about my battery is that it's essentially discharged every time I boot up the 740: the Battery Instrument says so. By the end of a typical flight, the same Instrument says it's fully charged. Does that mean the battery has timed out, or won't run the 740 long enough to find a place to land?
My 740 runs pretty warm--and a Kill A Watt says the 740 plus the iFly 120 V charger together draw 12 watts with the screen brightness turned up all the way. (A standard coffee mug warmer draws about 10 watts.) That would run a battery down fairly quickly, but I don't understand why it would discharge when the 740 is powered off.