Try the new PG6030 or PG6050 range and you will understand what the word means junk.
For the same price, the difference in quality is difficult to understand.
On the PG400 the engine is powerful and should run 5 times faster than the asthmatic PG6030.
PG400 weight = 151 gr
PG6030 weight = 103 gr
Everything else follows: the thickness of the metal shoe PG400 = 5mm, the PG6030 = 1mm
Power: PG400 = 3.5v - 1200mah = 4.2 watts
Power: PG6030 = 3.8V - 100mAh = 0.38 watts and yes !!!!
The engine PG6030 is so slow and thin metal, I managed to cut myself with.
So ---> bin, and I buy myself another PG400