Initial Battery Charge for the Mini 9


I’ve been getting a couple of e-mails and hearing from a few customers like ecoates1980 via Twitter and others like mrbofus who started this forum thread to say that the batteries on their Mini 9 either don’t seem to be charging at all, or that the battery won’t hold a charge.


Two recommendations for Mini 9 customers:

1. Please update your BIOS to the A04 version we recently published. 

2. Please charge your battery for at least 12 hours before using the computer on battery power.


Here’s what’s going on. If a battery is not charged for extended periods of time without use, the battery enters something called pre-charge mode, which means it is drained beyond the 0% capacity level. Getting the battery out of pre-charge mode can require that the battery to be charged for up to 12 hours.


This is not unique to the Mini 9—it applies to other laptop batteries that have not been changed for a long period of time. After the initial charge, the battery will recharge as you would expect. You may use your system with the included AC Adapter while your battery is charging.


If you are running the A04 BIOS and have tried charging your battery for more 12 hours or more and are still having problems, please contact Dell Technical Support. Customers in the United States can use phone numbers on this page to contact Dell Technical Support.


Here’s the process for customers outside the United States:


  • Go to
  • At the very bottom of the page, select your country in the Choose a Country/Region field
  • Choose Contact Us on the left hand side
  • Click on the More Details link in the Contact Tech Support section
  • Click on the green Telephone button under the Call Tech Support section


If you still need help after contacting technical support for this issue, please let me know in the comment thread of this post.

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  • gamenut

    any word on a fix for the powerfeng 77WH battery that causes the power and low charge lights to flash alternately  and occasionally says "unrecognized battery"? Thanks Ron

  • costmang

    Mine is out of warranty and they want to charge me to help. I can't find the airplane/aircraft manager that I see people talking about to see if disabled. I have the most recent version of BIOS (v6). Any suggestions? Please email me at < ADMIN NOTE: Email id removed per privacy policy > Thank you in advance.

  • thepcrescueservice

    Hi Lionel,

    I had this problem and purchased a brand new battery so that I could flash ths bios up to the latest rev (A07). For 24 hours the battery worked fine, now the same battery light flashing problem occurs. Can you please help. I have two mini 9s and both ahve this problem.