hello guys i have a (3-6v dc motor), (DC Motor PWM Speed Controller 3V 6V 12V 24V 35V), (3.7v 1200mah rechargeable battery) and a (Charging / discharging circuit MH-CD42 for batteries with 5V output). Everything looks to be working fine it spins and everything but when i put force on the motors shaft it seams to turn of the battery because everything loses power how can i fix it? is it the motors voltage drop and if it is then how can i fix it? can you recommend some components?