Latitude 15 5000 Series(E5550)notebook batteries,Latitude 14 5000 Series (E5450) notebook batteries,it is not normal for a laptop battery to die out on you for just couple of seconds especially you started out on 99% charge

Latitude 15 5000 Series(E5550)notebook batteries,Latitude 14 5000 Series (E5450) notebook batteries,High capacity DELL Latitude E5450 Series 4-cell 6800mAh (51Wh) laptop batteries,that's actually not normal for a laptop battery to just die out on you for just couple of seconds especially you started out on 99% charge,You may want to consider changing the battery already but also to be sure run a test on your AC adapter as well if you have a voltage tester see if it's giving enough juice to charge your battery.

High capacity DELL Latitude E5450 Series 4-cell laptop batteries
Voltage: 7.4V
Capacity: 6800mAh (51Wh)
Chemical: Li-polymer
Color: black
Property: new original batteries

Warranty: 9 months
Specials:  Save 30% OFF (including taxes)    

DELL Batteries

8V5GX

G5m10

G5m1o

G5mi0

G5mio

Latitude E5550 SERIES