how much is the rated A for the battery i should use to make the BH3-R moves properly
am using 500 mA dc source and its not working!!
please help
About 6-8 amps when walking, about 1-1.5 amps standing still.
depends on servos used, my chinese mg995 can draw around 15 amps especially when hex stands up from floor.
i don’t know how they doing that 
but normal high torque servo shouldn’t do that.
but if recalculate 15A/18 servos it’s less than 1A per servo so theoretically it’s in servo tolerance
are you sure ?? i need about 15 A ??
please anybody answer me,how come in the website the current of the battery is 2800 mA, and here you say that i need 8000 mA =8amp??
Ok battery class 101…
The mAh is the amount of current the battery can provide in one hour. So a 2800mAh battery can supply 2.8 amps for one hour. It can also supply 5.6 amps for 30 minutes, or 11.2 amps for 15 minutes. The larger the capacity the longer it will run, but at the same time the heavier it becomes. So it makes sense to buy a battery that provides the run time you need. More than that is just extra weight.
thank you very much !!
just wanna add not any accu can provide high discharge rate so be careful when choosing accu.
discharge rate mrkes in Cs - Coulons ( i don’t know is it correct write in english) so for example in this thread
you can see on images of accus numbers like 20C 26C or other it means that accu can provide 20xcapacity discharge power, so if you have 3000 mAh accu which have 20C discharge rate you can draw 60 Amps from it.
discarge rates which near critical for particular accu will shorten accu life. so if you use yours at max discharge rate it may shorten charge cycles from nominal 1000 to 100 for example.
shortly speaking if you planning around 20A draw and accu around 3000 mAh discharge rate should be at least 10C but better to have 15 and more.
try to find something related to RC models, these accus usually have high discharge rates
BTW: Digital servos does draw a lot more amp…