i used it only bc my hvd's button is funky(but still powers my pen), and i was going to send it back...but before sending it back i decided to experiment with it...lol. so i tried it knowing that if it screws up my hvd im getting a new one anyway, and if it damaged my herc i was just going to chalk it up as a lost and sell my other one online (i have 2 hercs unfortunately).
i dont wanna say "yeah do it bro!" and it ends up damaging ur equipment, but on the other hand im three loads in w/o any problems except dead batteries
on the description of the 3.7v herc it says it needs a 3.7v omicron or persei to operate, but the herc only gets warm
on the description of the 7.4v herc it says it requires the 7.4v persei.
so if 3.7v on a 3.7 pen only gets warm, you would think the 7.4v on a 7.4 pen would only get warm as well...right?
i think you need more battery to push the cart...thats y i went for it.
i could be very wrong, but it hits right...
i say try it once so u can at least form your opinion on weather u want to continue using it that way, or let it sit and collect dust until we get a set of directions...