mBot Ranger beeps and stops moving forward or backwards


#1

We recently got the mBot Ranger for my son. It worked great for several days. We recently transformed it in the Land Raider. When driving the robot on our iPad the robot moves for a bit then beeps and will not move forward or backward. It can turn and then beeps again. Any help?
Thanks.


#2

Are the batteries good?


#3

I have the same problem. As far as I can tell it is probably the batteries: the motors on the mBot Ranger require a lot of juice. Advice on here seems to be to source a rechargeable 7.4V battery, but I’m struggling to find a suitable one here in the UK.


#4