Summary: I just wanted to note that while this is described as working with the T520, it will only work for the T520 dual core. This will not charge the T520 quad core at a sufficient rate when the computer is turned on. You will need a 135w adapter for that.
Summary: First impressions are that it is not only structurally sound, but seems actually better than the original factory AC adapter I got! One big reason is that the OEM adapter is a 2 prong plugin where as this one has a 3 prong plugin for grounding. Have had it for almost a month now and has been working fantastically. No problems yet.
Summary: This is an excellent replacement for the Lenovo power supply with my Lenovo R60 Laptop. With my old previous power supply, I accidentally pulled on the cord of too many times, and it started to short out at the yellow-ringed plug-end that goes into the laptop. Unfortunately, you can't replace just that plug end. I've been using the new Anker unit heavily now for the three weeks I've had it, and it works perfectly. The power supply only gets slightly warm.
Summary: I bought this laptop for just $850 in 2009. Over the last 3+ years, I have taken on trips, meetings, airports, buses and just about everywhere and it still keeps ticking as reliably as ever. I've spilt ice water on it by accident, left it running in the backpack, dropped it a few times onto the floor from the table and couch. Yet, I have never once had a hardware issue, be it faulty screens, touchpad, mic, camera or speakers.
Summary: I bought this for our Lenovo ThinkPad T61 (type 8897) after losing half of the original charger for it. After reading several reviews of the cheaper chargers that made noises, died and/or caught fire, I was a little concerned about buying a non-Lenovo charger. The reviews on this one were better, but still not perfect. So far (2 weeks), I couldn't be happier.
Summary: I needed an adapter that isn't sold in regular stores any more. Buying direct from the mfg was ruinously expensive. This product is WAY less expensive, works great and was shipped quickly. Thanks for a great product!
Summary: I have a tendency to lose chargers (the previous one I forgot in LaGuardia airport after a night of no sleep, running to catch my flight). What a pain to pay $80 or more in the airport for a new one. This time, I just decided to wait til I got home, ordered it from Amazon, figured for the price there wasn't much to lose. Guess what - arrived in 2 days, fits perfectly, doesn't overheat, I'm a happy camper again. Maybe next time I'll order 2 just to keep one in reserve...