I want you to post the charging method.
The unit is bigger than I expected, but my fault for not understanding well the metric measurement system. I am surprised about the slow charging rate. The adapter is only 12.6V at 5A, so that is only 60W charging rate, That means I can use no more than 60W from this battery without losing charge. A 360WH battery takes 6 hours to charge at 60W. Is it possible to use a higher voltage charger (say 19V) without damage?