NinjaBatt Pro Battery M5Y1K for Dell Inspiron 14 15 17 5000 3000 Series 5558 5555 5755 5559 3558 3451 3551 5758 5758 5551 5755 5458 WKRJ2 HD4J0 GXVJ3 07G07 6YFVW K185W - Premium Cells [2600mAh/38Wh]

Tough to find aftermarket batteries for older laptops that actually meet or even come close to their advertised standards. This one is pretty good and probably worth the little bit more this one costs than other total no-names. Have to be sure to follow the break-in procedure in the instructions otherwise you'll falsely think it's no good when it won't charge 100% out of the box. I get a pretty solid 6-7 hours of life out of it on a full charge but all I'm doing is G-code programming in a basic text editor so not really stressing it too much, you might get less if you're doing more with your laptop.

This actually took longer to remove it from the packaging than to install. Extremely simple, even for an unskilled person.My cousin owns a computer repair business and recommended this seller and brand, as he has had success with their products in the past.

The company responded quickly and I received my battery promptly and in good shape. It is way too early to tell how long this battery will last. It works fine now but the length it holds a charge is a bit less than I had hoped.

The battery arrived with a 96% charge out of the box, and meets the battery life of the original, which was around 6 hours of normal use. The battery charges very quickly, and does not lose its charge over time, as other batteries I have tried did. Overall, this battery and this brand are worth buying from, and you will be happy with a replacement battery from NinjaBatt.

Easy install and so far is a perfect replacement. No issues with the laptop recognizing the battery; charged immediately. My old battery would last 1-1.5 hours. So far I've used this for 2.5 hours with 47% left. I'll update the review if it dies on me as others have noted but so far very happy with the performance and price.

Very disappointed in this battery. After being installed in my Dell laptop for less than three weeks, this battery no longer works. It will not charge at all. After about one week of use, it wouldn't hold a charge for less than 30 min. then it just stopped charging altogether. Had to bring my laptop to my trusted computer repair shop for diagnosis because the battery was "new" I thought perhaps there was another issue with my laptop such as maybe the charging cord or the charging port, but when both of those checked out as being OK, I was surprised this battery is defective since it's "brand new"! Since I ordered it through Amazon just a little over a month ago, the return window has now closed, so I'm forced to buy another new battery. I have let the seller know about the issue.

Pretty inexpensive battery and it worked well enough, but it lasted just over a year (twice now on 2 separate batteries) before I had to replace it. This, even after following guidance of not leaving it plugged in all the time and using the battery power until it had to be recharged. :-(

Excellent Ninjabatt Pro for my Dell laptop. Fit and finish are very good. It costs more than the competition, but it's worth it. So far, it drains slowly while in use, just like the original new battery. Hopefully, I'll get a 1000 cycles as per description. I'll monitor for a month, and if it's still good, I'll buy the same for use as back-up battery.