ASUNCELL MFKVP Laptop Battery for Dell Precision 15 7510 7520 M7510 17 7710 7720 M7710 Series 451-BBSF 451-BBSB TWCPG T05W1 GR5D3 0FNY7 1G9VM M28DH [11.4V 91Wh]

Great Value

This is not a 91Wh battery. Windows battery report shows it as a 76Wh battery. This battery only charges to 41%. My original battery is still good and it charges to 100%. I only bought this battery since my original battery is old and probably near end of life. This battery is not a good replacement and is not worth the money.

My old laptop battery died. This was a good replacement.

Longer lasting than mfg. original

The new battery fits perfectly into the my laptop. Shipping was fast. thank you very much!!!

My laptop did not recognize the battery

Design capacity for this battery is 91,000mWh. Unfortunately, the battery only shows a disappointing 76,000mWh. This is a very poor capacity for a brand new battery. If more buyers would learn how to run a Windows battery report, we could keep these battery sellers honest. Just Google "Windows Battery Report."

I figured for the price I couldn't lose too much.After monitoring the charge cycles for 3 weeks of vert light use, I thought I had a winner.But yesterday, I was using the laptop on a project and when the battery got low after 2 hours of use, I put it on the docking station and kept working for another 2 hours while it charged and shut it off about 10pm with battery at 63% percent.Well, it's been powered off and charging for the last 13 hrs and seems it not going to charge past 65%Fail.Don't waste your money.