NinjaBatt Battery for HP 756743-001 V104 vi04 756744-001 Envy 14 15 17 Series Probook 450 g2 g3 756478-851 756478-422 756478-421 756478-422 - High Performance [4 Cells/2200mAh]

I don’t write reviews often, but this laptop battery deserves some recognition. From the moment I installed it, my laptop instantly felt like it had a second wind. The installation was seamless—no tech background needed. It charged quickly, held the power beautifully, and I could immediately feel the difference in performance. As someone who relies on her laptop daily for both creative flow and client work, having dependable battery life is non-negotiable. This gave me peace of mind and hours of uninterrupted productivity. It also came well-packaged with clear instructions and even felt more solid than the original battery. I’m genuinely impressed by the quality. If you're on the fence, consider this your sign—NinjaBatt delivered. Highly recommend.

Had this battery installed on my HP Pavillion and it works like champ! Easy to install. It was somewhat charged when I received it. Took about 10-15 for fully charged. I haven't charged it since I purchased it about 3 days ago. Durable and perfect size. Absolutely recommendable!

Fit perfect. Powered up laptop as intended. Works and performs flawlessly.

Seems like a quality battery. Installed and will now see how it does. So far so good. Only problem was that it took two more days to ship than advertised and I needed it quickly. So only 4 stars.

good price. fit

Unfortunately this battery died after 4 months, Reaching out to Customer Service at NinjaBatt, my problem was resolved very fast and a replacement was sent overnight. Great service from the two reps I dealt with. Unfortunately there is a problem with something you might buy from time to time. Jolly and Jane took ownership of my problem in a very efficient manner. I thank them for great Customer Service.

My new battery came well packed, and with plenty of instructions for installation and usage. Just installed it to a customer's laptop and it came with a 33% charge that I'm to take to 10% (as per the instructions). Only complain is that the screw holes are like 1 mm or less further than the original battery and I had to put some strength when sliding it in, but it screwed nicely in place after that. Looking forward to seeing this battery work wonderfully for a couple years.

Worked great for the first few months. Now it doesn’t hold a charge for more than a couple hours..