Dell Precision M4800 Battery Light Flashing

Just installed this in my 5-1/2 year old Dell Precision m4800. Wow, what a difference! ** price, easy install and speed has increased 3-5 times it’s like a new computer. Great product!

Successfully recognized in Dell Precision laptop (2 lanes)

No issues installing this into a Dell Precision workstation laptop.

This is a very nice headlamp, without two levels of white light, a red light and a flashing red light.  Having the battery pack on the back makes it much easier to balance and the straps are adjustable over a wide range.

As many others mentioned in the reviews, these batteries are now new old stock, as the newest ones were made in 2022 and will arrive completely discharged. DO NOT give up on them - the charger will initially show an error (chamber and calibration light flashing) - keep taking the battery off and putting it back on, and eventually it will start to charge. The key is to not leave it in the charger if the charger is showing the error code, you have to remove and replace the battery until the charger shows that it is charging (chamber light and 50% light flashing). After a few hours the 50% light should glow solid and 80% should start flashing, and eventually it will charge fully

My APC UPS sounded off every few hours with beeps and a flashing red light to let me know it was time to replace the battery. I ordered online and the battery arrived sooner than expected. I installed it and it's been working fine since. The part I especially like, I didn't have to shut everything off to install.

I bought this a month ago when the battery died (I unfortunately did not notice the low battery flashing light indicator). The replacement battery arrived very promptly, was easy to install, and my backup is operational again — and just in time because a tornado hit here a few days later and I lost power for 8 hours.

but it is unsettling to have the upstream light flashing

Works very well in my old Windows 7 Ultimate, Dell Precision T1650...Nice speed increase for post processing photos in Photoshop and Lightroom Classic. Great service from the folks at B&H, as always.

Using this with a Dell Precision 7720 laptop and Wirecast for webcasting. Picture quality of the encoder thru the HDSDI looks great. Easy setup and so far works flawlessly!