T54FJ 8858X Laptop Battery Compatible with Dell Latitude E6420 E6430 E6520 | 65Wh 11.1V, Latitude E6440 E6530 E6540 E5520 E5530 E5420 E5430, Inspiron 17R-7720 17R-SE-7720 17R-5720 15R-5520 15R-7520

Unlatched the old battery (probably original - 13 years old) and put the new one in its place. That simple. Charged it up and laptop is working fine. No tools needed. Exact fit. Taeks only seconds to replace. Price is a good value for the money.

Works well and seems to hold a charge for a good amount of time for an older laptop

Really good for the price

Battery pac looks and fits well into computer, charged up fast and works well

Battery was delivered earlier than promised and works fine. It would have gotten all 5 stars, except it only lasts about 4 hours. That could be my old computer though.

Good price & value with fast service........... EZ install perfect fit

I bought an ancient Dell E6520 Windows 7 laptop at a thrift store that turned out to be nothing but one big headache to get working but this battery turned out to be the one brightside in that journey.The E6520 that I bought this for had an original 9 cell extended battery which was dead so I was forced to replace it. There are 3 battery choices for the E6520, a 4 cell, 6 cell, and a 9 cell. The 9 cell is the extended battery that provides the longest battery life but it also extends from the laptop body like the Hunchback of Notre-Dame and since I didn't plan on using the laptop that often unplugged I went with this 6 cell battery that advertised decent watt hours and fit the outline of the laptop. The 4 and 6 cell batteries have the same dimensions but the 4 cell battery would have been useless in my opinion.The reason I went with this brand is that the seller wasn't picturing the original Dell battery nor advertising their battery as genuine since new Dell batteries don't exist for any of their old laptops so the seller got my respect for being honest and not being shady. Secondly, unlike most of the white label brands on Amazon this brand appears to be made by an actual manufacturer of batteries among other things so I gave additional points for that.My final opinion was formed when I received the battery. It was physically well manufactured and fit nicely into the laptop which I can't say has always been my experience with other brands of batteries for other brands of laptops.My real pleasure and shock came from how long this battery's charge lasts. Under heavy use of downloading programs and installing them and updating Windows it lasts a little over 2 hours. Now when using the laptop for light use such as streaming videos I can't tell you how long it lasts because when I was doing that I got nowhere close to draining it to 20% in over 3 hours so I gave up and went to sleep and have care about testing it further.My only complaint about this brand is that they don't have a big product line and only sell a very limited number of battery models. After my experience with this battery I would have loved to replaced other laptop batteries with this brand but they don't make them.

Bought this as a replacement battery for a Dell Inspiron 17R 5720. This is the second replacement battery I've bought. About a year ago I bought a battery from a different vendor here on Amazon. It worked, with an odd issue on boot up (you got a message that there was an issue with the battery, and you had to hit F1 to continue to boot). That battery died after about a year, so I bought this battery. This battery performs like it is a Dell OEM battery. As long as no problems develop, I would recommend this battery, and would buy another if needed.