Cmos bios battery (RTC Battery) is for Acer Aspire S7-191-6447, S7-191-6498, S7-191 , S7-392 , S7-392-6484 (compatible, not OEM) with 2 pin plug (not OEM, yet compatible with NB.M4211.003 rtc assembly integration repair needs.) Will also work on Acer Aspire S7 -191 ultrabooks motherboards made for Acer by Wistron Helium boards: S7-391-53314G12aws 13.3" i5-3317U Dual-core S7-391-53314G25aws 13.3" i5-3317U Dual-core S7-391-53334G12aws 13.3" i5-3337U Dual-core S7-391-53334G25aws 13.3" i5-3337U Dual-core S7-391-73514G25aws 13.3" i7-3517U Dual-core S7-391-73534G25aws 13.3" i7-3537U Dual-core Although the cable on these above are much shorter and a better suitable model can be found on our other listings The renewal or replacement process might be something that can be somewhat challenging depending on the specific model of notebook, yet in most cases technical manuals will allow the scope of it's replacement process and allow owners to replace and renew the cmos battery. If in doubt, please ask us to assist or redirect you to that source help.
