It does not look like there is any support. The manual it came with has no sign of contact. No address, phone number, or even a company name. I guess that is the price of a cheaper charger. I did contact the site I bought it from, hopefully they have some good info.

I went through the directions and it does not look like I can adjust this. I should have mentioned before hand, but it only does this when I balance charger. If I use the normal charge, it charges to 8.4. But if there is no ill affect, I'm fine with leaving this alone. So far, very happy with the charger. It seems to have more features than my 2x more expensive TP-610c and gets the job done. Except for the fact that it charges a little high.

--pakk