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crwdns2934241:0crwdne2934241:0 Jon Mroz

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OK this has been solved..

When the replacement battery came in also not able to communicate i suspected a change in the firmware..

This laptop was on the latest A24 so i downgraded it to A14.             Now it works.

It seems that firmware Latitude E5550 A22 is when they changed the charging circuit routine and broke the ability to charge aftermarket batteries.. I suspect this is happening to any dell laptop.

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open