- btw. doesnt this option make total sense - especially when you have to do some sort of service (ram change etc.) - if there is a built in battery  - isn´t the board under current all the time then?!? So - (in theory) dont you risk a short circuit when changing ram etc? Prior to doing any work in the laptop, you should unplug AC power, disconnect the battery and then hold the power button 30 seconds to discharge residual power.  It's nowhere near as simple as when laptops had easily-removable batteries, as the old battery bays have largely disappeared in favour of internal batteries to achieve thinner laptops. which might be the best way to preseve battery life... Disassemble and store adequately - or just use the option "primarily ac power" and be done with it?!? (meaning: not overthinking it?!?) Well, removing the battery would prevent it from fully charging, but that's not very convenient for you, especially if you sometimes need to reinstall it to use on battery power. If you do remove it, charge it to 50% first. Dell Power Manager allows you to manage battery charging. You can use the simple option of "Primarily AC power", as you found. You can also use custom settings to set your own low and high charge thresholds.    
Hi there, title almost says it all. I have a Latitude 7490 - which I really like - but I struggle with the built-in battery as I am not sure which course to take to enhance/preserve battery life as I mostly use it on a docking station. I read that in a few Dells and or Lenovos there is a option in the BIOS just to disable it... but it seems the 7490 doesnt have this option.- btw. doesnt this option make total sense - especially when you have to do some sort of service (ram change etc.) - if there is a built in battery  - isn´t the board under current all the time then?!? So - (in theory) dont you risk a short circuit when changing ram etc? Well - to make things short: which might be the best way to preseve battery life... Disassemble and store adequately - or just use the option "primarily ac power" and be done with it?!? (meaning: not overthinking it?!?) Thx
Disable battery / dissassemble - or just use PowerManager and be done with it?