battery problems

Hey everybody, I recently bought a used W530 in good configuration and condition, and till then the laptop has been charged about 5 times in about a week, so I had some worked to do in blender that would take around 6-7 hours therefore after charging the battery to a 100% i unplugged it and...

Recently bought helios 300 predator laptop gtx 1050 ti. Problem is it charges upto 100% and when i remove the charger it drops down to 99% instantly. Need help.

My new DELL XPS13 loses power. The battery lost 8% of its charge when unused for about two weeks through early December. Earlier, the battery had self-drained by about 2% over three days. The unit was switched off with the battery fully charged each time. A few days ago, the battery level...