{
 "slug": "hp-elitebook-840-g7-rtc-battery",
 "title": "How to do an HP EliteBook 840 G7 RTC battery replacement",
 "model": "hp-elitebook-840-g7",
 "model_name": "HP EliteBook 840 G7",
 "component": "rtc-battery",
 "manufacturer": "HP",
 "url": "https://laptoppartfinder.com/guides/hp-elitebook-840-g7-rtc-battery/",
 "api_url": "https://laptoppartfinder.com/api/guides/hp-elitebook-840-g7-rtc-battery",
 "source_url": "https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf",
 "source_title": "HP Maintenance and Service Guide",
 "pages": "printed pages 28, 31, 33–34, 44–46",
 "service_classification": null,
 "bench_tested": false,
 "markdown": "# HP EliteBook 840 G7 RTC battery replacement\n\nSource: https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf (printed pages 28, 31, 33–34, 44–46). OEM-documented procedure; not bench-tested.\n\nReplace the OEM cabled RTC battery assembly as an intact service pack; no internal-cell dismantling or polarity/connector conversion.\n\nRTC is in the authorized service provider chapter; target access/replacement is ASP-only. [HP printed 33, PDF 43](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=43); [HP printed 43, PDF 53](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=53)\n\n## Assembly inventory and configuration\n\nL13694-001 is the listed RTC battery assembly for this exact model. A shared spare in another model is not blanket compatibility evidence. [HP printed 18, PDF 28](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=28); [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55)\n\nExact HP EliteBook 840 G7 and a verified like-for-like OEM assembly/configuration; preserve original routing and connector identity. Serial fit and regional eligibility remain unverified. Other models/generations, arbitrary substitutions and upgrades. No bare-cell substitution, pack dismantling, lead/polarity conversion, charging a primary cell or CMOS/password/firmware changes. [HP printed 18, PDF 28](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=28); [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55)\n\nPhillips P1; flat nonconductive, nonmarking release tool; grounded ESD workstation/strap. A nonconductive/nonmarking flat tool is an editorial selection where the RTC section says only flat tool. [HP printed 28, PDF 38](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=38); [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55)\n\n- **L13694-001**: RTC battery assembly. Role: target assembly. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55)\n\n## Documented facts and proposed boundaries\n\nThe documented service unit has a cable/plug and is removed intact. The procedure does not authorize opening its wrap, replacing an internal CR2032-like cell, changing lead polarity or attaching a generic coin cell. Basis: DOCUMENTED assembly/connector scope; PROPOSED substitution boundary. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56)\n\nThe illustrated RTC plug connects to the system board (callout 1); the tool release is callout 2 and pack lift is callout 3. The manual says to use a tool to release the pack from the computer; no RTC retaining screw or adhesive-renewal specification is supplied in this section. Basis: DOCUMENTED OEM text and applicable figure. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56)\n\nNo keyboard, radio antenna, speaker assembly, system-board or thermal-interface removal is an RTC prerequisite. The G7 main-battery removal does require freeing the inter-speaker cable from the battery clips and restoring it afterward; this is not speaker replacement or WLAN work. Basis: DOCUMENTED OEM text and applicable figure. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56); [HP printed 44, PDF 54](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=54)\n\n## Ordered replacement procedure\n\n1. **prepare** - Save work and shut down through the operating system. If power/hibernation state is uncertain, start normally and then shut down. Disconnect external devices and AC power before opening. Use a flat ESD-protected grounded work surface with a grounded wrist strap; avoid pins and circuitry and keep screws organized. Basis: DOCUMENTED shutdown/ESD precautions; PROPOSED organization join. [HP printed 33, PDF 43](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=43); [HP printed 31, PDF 41](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=41)\n\n2. **access** - Loosen the five captive Phillips bottom-cover screws. Starting near the hinges, use a nonconductive, nonmarking tool to release the cover edges, then lift the cover away. Basis: DOCUMENTED OEM operation paraphrased. [HP printed 33, PDF 43](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=43); [HP printed 34, PDF 44](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=44)\n\n3. **isolate** - Lift the tape over the main-battery cable connector and disconnect that cable from the system board. Leave its pack screws installed for now. Avoid sharp tools on the pack and metal across contacts. Basis: DOCUMENTED OEM operation paraphrased. [HP printed 44, PDF 54](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=54)\n\n4. **prerequisite** - Free the inter-speaker cable from the clips along the bottom edge of the main battery. Remove the four Phillips M2.0 × 4.0 battery screws and lift the main battery out. Keep the speaker cable and all nearby leads clear; do not remove WLAN antennas or the speaker kit. Basis: DOCUMENTED OEM operation paraphrased. [HP printed 44, PDF 54](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=54); [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55)\n\n5. **disconnect** - Disconnect the RTC pack cable from its system-board socket (RTC figure callout 1), handling its plug rather than pulling on the wires. This is separate from the already isolated main battery. Basis: DOCUMENTED OEM operation paraphrased. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56); [HP printed 28, PDF 38](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=38)\n\n6. **remove** - Use the nonconductive tool at the illustrated pack release point (callout 2), release the RTC assembly from its original seat and lift it out at callout 3. Keep the cabled pack intact. Basis: DOCUMENTED OEM operation paraphrased. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56)\n\n7. **install** - Seat the matching L13694-001 intact RTC assembly in its original holder/recess and orientation by reversing removal. Keep its existing connector/lead arrangement; do not dismantle the pack or infer loose-cell polarity from the drawing. No RTC retaining screw, added adhesive type or torque is specified here. Basis: DOCUMENTED reverse installation expanded; PROPOSED intact-pack boundary. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56)\n\n8. **reconnect** - Route the RTC lead as originally installed and reconnect its matching plug to the system-board socket. Check that the pack is retained and the lead is clear of surrounding hardware without pulling, twisting or trapping it. Basis: DOCUMENTED reverse connection/cable-care rule; PROPOSED retention/routing check. [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55); [HP printed 46, PDF 56](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=56); [HP printed 28, PDF 38](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=38)\n\n9. **restore** - After checking the RTC pack and cable, return the main battery to its original seat and install its four Phillips M2.0 × 4.0 screws. Return the inter-speaker cable to the clips along the bottom edge of the battery. Reconnect the main-battery cable to the system board and restore the tape over its connector. Basis: DOCUMENTED reverse battery procedure; PROPOSED inspection join. [HP printed 44, PDF 54](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=54); [HP printed 45, PDF 55](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=55)\n\n10. **close** - Refit the bottom cover, engage its original edges and tighten its five captive screws in their original locations. Reconnect external devices and AC only after the enclosure is secured. Basis: DOCUMENTED reverse-cover procedure; PROPOSED closed-unit restoration join. [HP printed 33, PDF 43](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=43); [HP printed 34, PDF 44](https://kaas.hpcloud.hp.com/pdf-public/pdf_12437502_en-US-1.pdf#page=44)\n\n## Proposed checks and limits\n\nUNPERFORMED PROPOSED editorial check after correct complete reassembly: observe ordinary closed-unit startup and the displayed date/time without changing firmware settings. This is not a replacement interval, diagnosis or password-reset claim.\n"
}