Hi again

A lot mentioned their tx Battery. Yesterday I tried to charge the battery , charged around 850mah on the battery (vampire 2500mah) , but after 10 minutes when I tried to charge again the voltage was dropped to 6,65. Also if I tried to discharge with 100mah it dropped rather quickly , down to 6,65v.
If I do the same with my race batteries they hold the charged voltage , at around the 8,40v.

Will try to by a new tx battery