Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Will this work to convert a new E540 and an old X230?
Document: This was a perfect cable for my needs, I needed something to convert my old laptop's power code with the new laptop and this did the trick! Cheap, simple, lightweight!
This product is a low cost alternative to buying all new chargers since Thinkpad changed the male end of the charger. Having collected several chargers over the years to have one at work, home, travel, car etc. this was a great way to convert them all over inexpensively.The product arrived quickly and at a fair price.
Perfect adapter for converting an old style Lenovo power supply to work with the new laptops
It absolutely fits my T440s. I am able to use my extra charger of T420 with my new laptop now. Perfect fit to make old charger work with new laptop in reasonable price.
Just make sure that the brick and male end of the charger is a Lenovo charger not just any old charger. I would give it five stars but ive only just plugged it in and I need to see it work for more than just a day but other than that Im relieved that I don't have to buy a hole new charger.
I bought two of these modestly-priced power adapter cables to link my old round-hole power source to my new extra lightweight rectangular source. They both came, but one didn't work. I got a follow-up email from Patuoxun re customer satisfaction, and wrote what the problem was. Without further questions or delay, they immediately sent me another cable. And they were very nice about it! Five stars easy!
I had 3-4 power bricks from my old thinkpad all over the place - at home, at my desk in the office, in my laptop bag. When I switched to the X1 with the newer USB-style power tip, at first I thought I have to spend hundreds to get new power bricks. Till I ran into this little item. Bought 4 of them and they all work great and I am reusing my old power bricks.
Got a Thinkpad T440S for work and discovered Lenovo changed to the new rectangular shaped power plug on this model. My last 3 Thinkpads used round style connector, so I have a bunch of the old style power adapters that cannot be used with this new Thinkpad. I like to keep one power adapter in my travel bag, one in the office, one at home office, one in bedroom, etc.
Like many others, I personally and at work have several Lenovo power supplies from older machines like the X201, T400, etc. lying around. Now that I have a Lenovo Helix and a Lenovo ThinkPad Yoga, along with an X230 and X220 I don't want to have to carry two power supplies in my bag since I switch which machines I carry all the time. This adapter allows me to just carry the older power supply and have it work with any of my machines.I ordered two of these.
Works great on my thinkpad X1 carbon touch, now my old thinkpad AC adapter can be of some use, and I don't have to carry my X1 AC adapter between work and home anymore.
Answer: Yes