When I previously contemplated getting a Li battery for my wife's Roomba, everything I read indicated the OEM charger could not be used with them. When I visited the ProTech Robotics site, it was unclear from the "Details" about their Li battery whether a separate charger or the OEM charger was required:
"Each cell has is own PCB to protect against over charge, discharge and short circuits"
I wrote to ProTech customer service asking if a separate charger was required as I couldn't find one on their site. I got no reply. A month later I wrote again and got the following reply:
"since the question is covered in the details for the Li-ion battery we did not feel a reply was warranted. http://www.protechrobotics.com/proddetail.php?prod=4565445-LI"
Customer Service Representative
Apparently, my question was still too stupid to "warrant" a polite or curtious reply. I can only guess at the reception of ProTech's "customer service" if I had a question or problem with a purchase from them. Are there any other suppliers of Li batteries for the Roomba or am I stuck with the original? Damned if I will deal with a company who can't answer a simple question or treats me the way ProTech did.