Say a couple of tens of hours the most. Data being factory set permanently on is crap amateurism design by the way in that department if you agree.
Do you really have a choice? Read the chip's datasheet. Unless it was a new design to have a dual function switch to switch of RS232 which turns on APO
There isn't a extra button because they got laaaaazy! The hold button isn't used for a backlight because holding it down for 3secs enters delayed hold
Say a couple of tens of hours the most. Data being factory set permanently on is crap amateurism design by the way in that department if you agree.
1-2mA draw with data on, let's just say the stock battery is shit. Use a GP green battery then, those things go for 24hours with 8mA draw so you'll get about 100-200hours lifetime!
NOTE: Continuity draws 5-6mA
Data transmission doesn't put much strain on the battery. Only uses 0.2 mA on the Uni-T 71D. Probably the same on the 61E.
Don't know about that but that is worth a try. 0.2mA is alot when you are talking about PP3 batteries