batterytime

Hi I just bought mi first Tentacle and it works perfect exept the batterytime is only about six hours? I hawe been charge it for at least four hours three times now with two diffrent chargers. The green diode flashes in the start of the charging cycle and after like only 30 min it lights steady.

All functions works, byt batterytime is to short. Can it be something wrong on my unit?

//Markus Gieselmann

Sweden