This happens when the internal battery is too flat. This unit has a problem with self discharge, even when turned off if you leave it about 3 months without charging the internal lithium battery goes so flat (like 1 volt) it can't even recharge from USB and won't charge at more than a few miliamps as per seen in this video. You literally have to use an external power supply to give it some juice first via the welding leads (positive on the outside most lead) for a few minutes before it will then charge normally on USB (I use a Lab supply set to 4 volts 0.5 amps limt) It's a major defect as letting lithium battery drop below 2V will damage it over time. So if you have this, charge every month!
@@sabudjed1135 yeah just use two AA, C or D batteries in series (long ways taped together in the middle or battery holder or whatever) then bumpy (positive) end of battery connect to the welding lead closest to the side of the unit, and other lead to the non-bumpy (negative) end of the batteries wait a few minutes, disconnect, and that should then should allow it to charge off USB again with a bit of luck.
Hi there. I have a bay same spot welder and i have same problem how can I fix it?
Banggood Refund
This happens when the internal battery is too flat.
This unit has a problem with self discharge, even when turned off if you leave it about 3 months without charging the internal lithium battery goes so flat (like 1 volt) it can't even recharge from USB and won't charge at more than a few miliamps as per seen in this video.
You literally have to use an external power supply to give it some juice first via the welding leads (positive on the outside most lead) for a few minutes before it will then charge normally on USB
(I use a Lab supply set to 4 volts 0.5 amps limt)
It's a major defect as letting lithium battery drop below 2V will damage it over time. So if you have this, charge every month!
I have the same problem.
Can we use a dry battery to do that.
@@sabudjed1135 yeah just use two AA, C or D batteries in series (long ways taped together in the middle or battery holder or whatever) then bumpy (positive) end of battery connect to the welding lead closest to the side of the unit, and other lead to the non-bumpy (negative) end of the batteries wait a few minutes, disconnect, and that should then should allow it to charge off USB again with a bit of luck.
There is a chance that the battery connector may loose, try to resolder it.. 👍
is it fixed now?
Money back from Banggood
@@DPoly Glad I bought another one
This is a very useless item. Money wasted.