40Wh XCMRD 14.8V Battery for Dell Inspiron 15 3000 Series 3542 3543 3521 3537 3531 3541 17 3721 3737 15R 5537 5521 17R 5737 5721 14 3421 3437 3443 14R 5421 Latitude 3540 3440 P28F P40F FW1MN 4WY7C

Exact fit for my wife's laptop. Swap was easy, included screwdrivers weren't the best. I used my own to avoid stripping out screw heads, but they will do the job, the spudger tool was adequate to separate the case as well. Battery charged fine and seems to work well. Time will tell how good it's longevity is, but for the price it worked out great!

Got this for my Dell Inspiron P70F002 (7580 series I think). The plastic support holding the battery in the shipping box was shattered into little pieces so I had to pick them out of the battery's port. The included screwdriver and blue shim for removing the backing plate of the laptop was super helpful. Screwdriver fit the screws perfectly. The battery is an exact fit and the plug fits in the battery's port snuggly. After replacing, the laptop turned right on and displayed 31% charged. The instructions say once you confirm the batter will charge when plugged in, you should then unplug it, discharge to 5% then charge to 95% and repeat this cycle 3-4 times. Overall, replacement was quick, easy, and it works great so far. Time will tell how long it lasts.

replaced a truly dead battery in my Dell laptop. Followed the instructions and used the laptop on battery only for a two hour meeting. Still had a significant charge left when I was done. Quite happy with fit, function and happy with the price.

This is the second battery I’ve gotten for my work laptop. Love the fact it comes with tools to replace. Battery life is pretty good for what I use it for. Fit perfect for my hp laptop. Works well, just wish the battery life was a bit better.

Works great and easy to install.

This is a great value for the money. Battery life is good and it fits perfectly.

Needed a new battery for my Dell 13-7378, which was working, but the mouse pad wouldn't click when pressed. Thinking it was faulty, I took the back off and found the original Dell battery had puffed so much it applied pressure to the pad making it inoperable. Also, the battery could eventually explode causing more issues. I searched for a replacement and found the Dell brand was almost $100.00! Wow! I then chased down some aftermarket batteries. One important thing for me was a warranty and the Packages includes: 1PC WDX0R laptop battery(with two screwdrivers and manual for easy installation). 24x7 Email Support. 60 days money refund / 12 months replacement supported if any issues. Next was pricing which I found to be in the $40.00 range +/- so I felt confident the Emanjor 42Wh WDX0R laptop Battery could work just fine having the 12mo. warranty, and at a pleasant price of around $30.00 icld. tax and free shipping. Installation is a snap on my Dell with just nine screws on the rear cover to remove. The battery comes with a spunge tool and screwdrivers if needed, although I have my own set. Unplug the battery lead from the m/b and four screws and the battery is out. Change the charge lead and plug it back in reverse order. Firing up the laptop after completion the battery showed 62% and worked flawlessly. Overall a very good choice!

October 2025: I was hesitant at buying this at first but so far so good!!! I've been using it for the month now and my laptop is running great on it. Charges well and holds well for 8 to 12 hours with multiple windows up and while watching videos. It was a great buy for a reasonable price! December 2025 UPDATE: I did not really start using this battery until August 2025 to December 2025 when I first made my review. Now that it is December this battery WILL NOT hold charge AT ALL. I was busy in school and suddenly I noticed that the battery was draining extra fast for the past few days. I thought it was because I was doing a lot of work on it but when I closed off all my windows, the battery at charge will not surpass 30%. And once I unplug the charger, the laptop won't even turn on. I have to keep the battery plugged with the charger. This was a BAD BUY. I wish I could change my rating to a 0 star. I did all the tips and tricks to make this thing work but it's not working. I wish I knew how bad this battery was earlier because it's a officially a year purchase even though I did not use it for a whole year. Other signs I didn't think it was a battery problem at first was that occasionally the laptop would cut out on me but that only happened about 2-3 times. So yeah, highly disappointed. I honestly don't want to buy this again despite how cheap it is. it is CHEAP in terms of quality and cost.

Très facile a installé et fonctionne très bien

Works great. Fit fine and works as well as the OEM battery.

My XPS 13 9370 original battery was failing. It couldn't keep a charge once unplugged. I chose this one as the replacement as one from Dell would have cost $180+. It's been two weeks so far but everything looks good. The install was straightforward. The battery charges well and lasts for about 5-6 hours while streaming. Would recommend.

Seems to be working well,

Simple enough install in my Samsung Galaxy Book 360 and it performs well - only in use 2 weeks so far.