Lenovo s730-13IWL battery discharge when power off

[MarkoChesh]

Hi, I have s730-13IWL that looses battery charge when turned off (around 10% per 24 hours).

What I did so far:

- Diasable Windows fast startup;

- Turned off Always ON USB from BIOS;

- Disable WIFI from BIOS.

The system is with BIOS version 8HCN33WW from 11 Jul 2019.

I can`t find any older version to try downgrade.

When I serch the forum it looks like this is a common problem with alot if Lenovo models.

I am also working with HP, ASUS and Huawei laptops and they looses no more then 2-3% per week if not used..

Any suggestions on how to fix this or where to find previous BIOS?

[AYoung8]

Yes, we are in same situation. I thought my softwares and may be sleep mode consuming battery. I have to recheck it.

Thanks.

[Jwes_Lenovo]

Hi there! Can you try the similar steps provided in here: https://forums.lenovo.com/t5/Lenovo-Yoga-Series-Notebooks/Battery-drain-when-710-is-off/td-p/3616800. Update us how it goes.

[MarkoChesh]

Hi, thanks for your reply. Unfortunately the solutions there didn't help me. It looks like when the drain is huge (like 30% per night) the most common reason is that the laptop is hibernated or in sleep mode. When the leak is small it usually comes from AOU function or BIOS bug. I have tried to turn off AOU (as everything else that can be turned off/on in BIOS) but without any luck.