So the question is this, on the X200 Ultrabase, if a battery is attached to the base, what order does it charge in? I know with Ultrabay batteries on my T series, the laptop will always charge the system battery all the way up before giving anything to the Ultrabay battery, is that how the X200 Ultrabase works too? (Note: I'm aware you can put batteries in the Ultrabay slot of the Ultrabase, that's not what I'm talking about, the Lenovo documentation shows a plug on the side of the Ultrabase for connecting a second system battery.) Or does the Ultrabase charge both batteries at the same time (doubtful, but would be awesome). I assume it won't charge a battery w/o a laptop docked, right? Can anyone who is using this arrangement shed some light on the situation? When power is only on for a few hours, you have to charge all the batteries you can while the juice is flowing, so I'm trying to figure out the best arrangement!
(I greatly lament the fact that an (I'm sure extremely unpopular) accessory was dropped from the Thinkpad lineup. Back in the T4x series, there was a "battery charger" that just took input from a T4x power brick and had a little connector to connect to a system battery - it charged with no computer needed. That was great for my application!)
I understand this is an old question, but for anyone looking for some answers: Yes, they charge simultaneously.
Actually, it does charge a battery without a laptop docked.
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