Replacing RTC (CMOS) Battery on HP Envy 15T-1100 CTO

Discussion in 'Hardware Components and Aftermarket Upgrades' started by moviemarketing, Nov 3, 2015.

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  1. moviemarketing

    moviemarketing Milk Drinker

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    I found that this part is no longer carried by hp (part# 576848-001 for product NX346AV)

    The same was true for the CPU heat sink assembly, but I was able to find the corresponding part on Alibaba for around $20, and with the helpful guidance of some kind NBR members, I was able to replace it myself.

    In the case of the CMOS battery, the correct part is available from US sellers for in the range of $60-80 (one seller lists it for $58 + $34 shipping!).

    On Alibaba I can't find the exact part, but I'm wondering if the CMOS battery for a different hp laptop might work?

    Here are a few that I found for about $5-10:

    http://www.aliexpress.com/item/1PC-...-DV6200-DV6300-DV6500-DV9000/32271835302.html

    http://www.aliexpress.com/item/Batt...6000-NX6110-For-Presario-300/32267321221.html

    http://www.aliexpress.com/item/CMOS...-HP-COMPAQ-G62-CQ62-G56-CQ56/32434611365.html

    This Compaq one looks extremely similar:
    [​IMG]

    Here is the only pic I could find for HP Envy (from the manual):
    [​IMG]

    Is it worth trying one of these other batteries?

    This exact same Compaq battery, stamped "Newsun CR2032HF-24" is also listed for HP Probook 6560b and Elitebook 8570P. I feel like it might be the same one in the Envy - what do you think?

    http://www.bonanza.com/listings/HP-Elitebook-8570P-CMOS-Battery-CR2032HF-24-3V-652650-001/216181334

    http://www.bonanza.com/listings/Hp-...WFEVBh43Z-zz4TXZwG_Qr1tmP0Xt5eW5DQaAkgp8P8HAQ
     
    Last edited: Nov 3, 2015
  2. t456

    t456 1977-09-05, 12:56:00 UTC Moderator

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    Even better; any CR2032 is fine ($0.15).

    Just get a new cell and remove old one from the plastic wrapper + cable. Hold new cell in-between the two tabs and wrap tightly with electrical tape (for proper connection). Old cell is probably spot-soldered, so you need to pull a bit or use a knife/pliers to separate the two tabs from the cell.
     
  3. moviemarketing

    moviemarketing Milk Drinker

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    Oh wow, thanks so much!

    I had removed wrapper from the old one and I saw that it was the same CR2032 battery inside. Was going crazy trying to figure out how to replace it without damaging the harness.

    Do the tabs pivot? Or do I need to pry them outwards? (Scared I might break the tabs.)

    EDIT: Also, after I do this, do I need to update or make any changes to my BIOS?
     
  4. moviemarketing

    moviemarketing Milk Drinker

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    Managed to replace it with CR2032 from Home Depot, using the following method, and all the issues went away.



    I couldn't find any of that little conductive metal tape he uses, so I just held the tabs in place with my fingers and wrapped the whole thing tightly with electrical tape.

    On startup I got an error message indicating CMOS reset, and second time it started fine. Do I need to make any changes or updates to BIOS at this point?
     
  5. alexhawker

    alexhawker Spent Gladiator

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    The BIOS usually resets to default. If you were already at default, then no.

    If you modified something, then yes.
     
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