Why is my battery not charging

[Farmer]

I thought the battery was dead, but after chrging it overnight it is reading 12.6V
I put it in the PCX and it started up straight away. I tested the voltage over the battery while it is running and it only read 10.2V.


Does that mean it is not charging?
Where can I start to look for ther problem?

[Conelite]

Add info about year of bike, age of battery. miles on bike? Do you run any accessories? is it bone stock?

[Farmer]

it is a stock 125cc 2012 model. Battery is new. +/- 50000 miles on the clock

[iceman]

Seems low - my 12 pcx batteries measure over 13v off load or out the bike,