45W or 65W power adapter for T440s

Which is the correct power adapter for the T440s....45W or 65W adapter that Lenovo is selling under the accessories section? The websites pulls up both adapters for the T440s. The 45W adapter output is 20 volts, 2.25 amps and the 65W adapter is 20 volts and 3.25 amps. Is one adapter more recommended over the other? Are their pros or cons to either? Does one charge faster but reduces the battery life?

@sjahanmi,
Parts list for T440s -> http://download.lenovo.com/parts/ThinkPad/t440s_fru_list_20130724.pdf
I will recommend calling the call center to get the recommended AC for the laptop.
Which AC did your laptop came with btw?
For mine I had the 65W for my T420 however one of my colleagues had the 90W one, its also usable however it seems like their laptops charge faster than compared to mine. I am not sure if its a placebo effect or it does charge faster.
I think the best way for you is to contact the call center and provide them with the machine type and they will recommend you accordingly.
*Non Lenovo employee*
I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =)

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Intel-Based Apple notebooks: Identifying the right power adapter and power cord - Apple Support
http://support.apple.com/en-us/ht2346
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45W or 65W power adapter for T440s

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