I am a DCSE, and there have been many issues reported with the Dell Battery packs. You may want to contact Dell and maybe exaggerate your issue to them.
The new and improved battery does work better, but it won't take long before it's life gets shorter and shorter until it stops holding the charge.......and batteries aren't cheap either.
...it finally happened, there are no more secret spots
I bought a remanufactured one on ebay for about 40 bucks, the first one they sent was junk, it was crashing my laptop. I sent it back and they sent another one, no problems with number 2.