battery "max amps" rating?

let me explain the question

- thinkpad x230 has a 20v 3.25A 65W power adapter - the battery is 11.1V 63wh 5.6ah

the battery doesn't list any kind of max A rating unlike the ac adapter, but assuming the laptop can consume 65w of power that means the battery has to be able to put out almost 6A of current, at least for short periods of time? (65 / 11.1)

2nd part of question: im using an external multi voltage battery pack to charge through the slice battery at 20V 3A max, thats 60W but assuming losses from all the voltage conversions and circuits it probably can't output more than 55W max @20v, what happens in the event that the computer tries to draw more than 55W? or for that matter if the 65w power adapter is maxed out? does the computer shut down or does it just use the battery for additional power / clock down the cpu?

3rd part: since my laptop has 2 batteries , both are charged when i connect the battery pack AND it's running the computer power at the same time, does the laptop prioritize power for running the computer and only gives excess available to charge the batteries?

4th part: when running laptop with stock 65w adapter and no battery in the laptop the CPU speed is throttled even if not using all of the wattage of the ac adapter, this can be fixed by using a 90w adapter but this basically means that the 65w adapter is unable to run the computer at full speed and requires the battery to act like a secondary power source at full power, right? so, going back to previous part that means if i am using a battery pack that is only outputting about 55w i can actually get into a situation where im draining batteries still while using it to charge the computer?

5th part: the 90w x230 adapter is 4.5A - 40% more powerful than the 65w (90 / 65) , is there any way to estimate how much faster the 2 batteries would charge if i connected an x230 with both batteries drained to it AND was using the computer at the same time? because thinking about this the 65w adapter seems like a very inadequate solution for charging an x230 with 2 drained batteries while its being used if it's not even able to provide sufficient max wattage without the battery helping at max load

 

According to Notebook Check's review of the x230, it has an actual maximum power draw of 46 Watts. With a 65 watt adapter, there is always sufficient energy to run the computer as well as charging the battery. That addresses questions 1 & 2.

In answer to question 3, the notebook does prioritize current operation over charging.

For question 4, the throttling is a prevention mechanism in the BIOS just in case. Real-world maximum power consumption is 46 watts, as stated above.

Question 5 cannot be answered without knowing the specified charging characteristics set in the batteries. Smart batteries cannot charge faster than a set certain threshold, so I can't tell you how much extra wattage can be utilized to charge the system.

 

so that would mean that at full load there is only 1A@20V charging capacity available for both batteries using a 65W adapter vs 2.25A@20V available using a 90w adapter...big difference

is there some kind of dc-dc converter between the battery and the ad adapter? the battery is 11.1V nominal and the adapter is pushing out 20V....