New E6420 T54FJ Laptop Battery for Dell Latitude E5420 E5530 E6430 E6520 E6530 E6440 E6540 E5430 E5520 Inspiron 15R (5520) 17R (5720) 17R (7720) 15R (7520) P/N:8858X T54F3 M5Y0X P8TC7 P9TJ0 R48V

Work perfectly for 3 hours

My old laptop's battery died a couple of years ago, so I stopped using it. However, I needed to info access information I had stored on that computer, but I was unable to get past the "you need a new battery" screen to access the machine. So I bought this replacement battery. It took me about 5 minutes to unwrap the battery and place it in the slot. (No disassembly or screwdriver required.) Immediately, the battery worked and I was able to access the data on the computer. It charged with my OEM Dell charger to a full charge that lasts a couple of hours depending upon what I'm doing. Although I have a newer computer, I'm now using the old one to watch DVDs on the go or surf the internet wirelessly at public wifi without worry. My only regret is I didn't buy it sooner.

Items were as described and delivery was fast even without next day delivery.

2nd update.Received replacement battery and it was recognized by my system and is charging fine.Thanks to Pete at Solice for his help in getting a working battery to me. Can not give a five star rating for the product due to the problem with the first battery, but give their customer service the 5 star rating for their efforts in solving the problem.Update.The first battery did not work for me. I reached out to the seller and they have been helpful in trying to get the item to work, but were unsuccessful. I've returned the first battery and the second is in route. I'll update my review again if the second battery works.So far, No good. I purchased this replacement battery as a Christmas gift and have had no luck in getting it to work. My system (Dell inspiron 5720) shows the battery at 72 percent but not charging. When I remove the hard wire power supply the system shuts off. I've tried removing the battery and turning on the system with just the power cord, then shutting down and reinstalling the battery, but the results were the same....72 percent charge, not charging, and not powering the laptop with it unplugged from the wall. I tried a similar move where I removed the battery and power cord, held the on button to release any residual power to the system, reinstalled the battery and power cord only to show the same disappointing "not charging" info.The seller had reached out to me for a review of the product and said I could e-mail them with any questions. I did so this morning and will update this review if they are able to get the battery working for me. Until then, I can not recommend this product.

Fits great and works as it should. I have an old computer but it does what I need to do. Last battery from a different source lasted about 3 years daily use. So far this battery fit and charged as it should. I believe that old weak old batteries that won't hold a charge put an unnecessary stress on the charging systems in much the same way that old car batteries do.

I bought this in December and thought it was working great but it isn't.When unplugged while running, the laptop runs well on battery, but when I try to cold boot, it fails to boot. My guess is that it doesn't support the necessary inrush current on power up.Unfortunately, I hadn't tried the cold boot for months as it's been on my desk the whole time. Last month I went to use the laptop at the table and the battery couldn't power in the system.

The installation was very simple. Seems to work well. It had 60% charge and charged to full. I haven't tested its performance yet.

This is a passable battery but failed after 15 months. This was for an older laptop that doesn't get used frequently, so the battery probably only had 15 to 20 discharge cycles before it failed. I'll probably look for a different battery this time.