It appears from reading so many other reviews and rants about this battery in the Dell XPS M1730 there is a problem, battery failure is the same old story of failing just after the warranty expires. A few weeks after my warranty expired my battery failed. I have never called upon my battery to run my laptop alone. The power adapter has been plugged in at all times. The rechargeable battery apparently failed to recharge itself. And thouh the power adaptor that charges the battery it still has gone bad and Dell will not replace it without charge. Obviously Dell does not stand by their products and I conclude this is a case of 'planned obsolescence'. BAD DELL!

I learned the Battery warranty covers only one year irrespective of the extension. Batteries are consumable products and they lose charge easily upon usage and hence they carry only one year warranty from the date of purchase.

My laptop was a gift from my husband and he purchased 3 years of extended warranty....now I'm thinking that was a waste of his money. Perhaps Dell doesn't produce quality products after all and we consumers should consider other makers.