cmos battery location

[fvanduren94]

Hello, I have a laptop HP 15-dy2035tg and the battery wont charge and also it says error cmos reset 502 whenever I turn it on. I was going to replace the main battery but I also wanted to replace the cmos battery because I tried resetting bios etc and I'm still getting the 502 error. I was wondering where the cmos battery is located because I opened it and I couldn't see one anywhere. I know some modern laptops don't have a cmos battery and use the main battery to perform the same function so before I try taking out the whole mother board or doing a more serious disassembly I was wondering if anyone could tell me if they know for this model if there even is a cmos battery. 

[banhien · Accepted solution]

@fvanduren94 

No, it does not have RTC or CMOS battery. Many machines now do not have RTC or CMOS battery. Battery won't charge could cause CMOS error

Regards.

[fvanduren94]

Thank you. Also I was wondering something else. I'm not using the exact charger that came with the laptop. But it is an HP charger and it's 45w at 19.5 v and 2.31 amp. This should be fine I believe but I wanted to make sure. I'm not sure why the battery won't charge as it was like this when I got it. I accidently plugged in a 65 W charger when I first went to charge it but as far as I can tell from what I've read on the internet that shouldn't be much of an issue. This 65 watt charger also has a center pin and from what I can gather from the internet it looks like that means it's a smart charger but I'm not sure on this either. So I don't believe using the wrong charger is why my battery won't charge but I'm not sure and was wondering if you or anyone else had any insights on that.