Thanks Edward. My battery was in fact discharged at that moment. If I have a bad battery, it will be the first time I missed a battery problem. At REC1 output full acceleration, it is always full amps 450A until temp protection starts to cut back. I have put my clamp meter directly on plus battery cable and at full speed with 1A closed, the steady amps always remain at 220A with no load on the forks. I think this is pretty high. I have inspected every component, cable and all with insulation test and megohm test at the motor. Every test has shown perfect. I can't find the reason why it is overheating although it should be easy to find. The drive motor becomes also very hot. My last try would be to gravity test the battery (but the battery is a Deka less than a year old) the previous battery was really shot but none of these problem was present then. My last diagnostic is that the motor winding must be shorted together this affecting the magnetic effect and causing more effort to accelerate this translating in a high current usage. Does it make sense? I can't measure winding resistance to prove it is too small. This is why I will gravity test the battery because if I tow the customer's truck to our facilities and have the motor re-winded and the problem still present I will look very bad. I take care of this customer's for five years now and he knows I'm not a newbie but this will make me look like if I'm wrong I keep you posted. Thanks for the time you take. Regards!