I don’t know whether i can “add” this information to device page, so i wanted to CONFIRM, that as long as you have M.2 storage in your e5570, uprade of 6MT4T (7.6V/ 62Wh) IS POSSIBLE.
I’ve bought 11,4V 84Wh (9-cell) WJ5R2 model and just replaced old one.
What is important: you have to buy with dedicated battery-board cable, as latter isn’t compatible with bigger cell.
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Generally speaking with E5 Series machines, it depends on the drive setup. The HDD based ones tend to have a smaller battery since Dell uses part of the battery bay for the drive, but if you have one with a card SSD you can fit a larger battery in BUT you cannot have a second drive. This is the golden rule for pretty much all of them.
On the NVMe generations, it’s not an issue because the drives are worthwhile but on the mSATA ones, you’re better off dealing with the capacity compromise since mSATA is such a garbage standard.
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I know on older laptops before they went to internal batteries, you could buy upgraded ones but they were physically larger. I know dell doesn’t sell batteries for their laptops if they’re internal and want you to send it back claiming it’s “too difficult” to replace when it’s just a handful of screws and no glue.
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