bmstew313
New Member
I'm having issues determining if my batteries are bad in my Genie scissor lift, model GS2646 with Trojan T105 batteries. The batteries are mixed batteries from 2022. Fully charged, the batteries read around 26 volts as a full pack, individually about 6.5 volts a piece. When a function is used, the voltage drops to around 22-23 volts, but returns when use of the function stops. The meter on the platform control drops pretty quickly as in about 100 yards, goes from 6 bars to 2-3 bars and can sometimes not even get a full days use out of the lift. Our manlift rental department replaced the charger thinking it was bad, so I can rule the charger out already. I had a brand new ECU to rule that out, thinking it was sending a bad signal to the platform controller, and it made no difference. The motor gets warm, but never hot. I see you have mentioned using a carbon pile tester to load test the batteries, but from what I have read, most carbon pile testers will not test deep cycle batteries. So my questions are 1) do you have a carbon pile tester that you recommend? and 2) would you have any other recommendations on where to go from here? My supervisor doesn't seem to think that the batteries are bad, but everything is leaning towards bad batteries. I saw that it was mentioned somewhere that a fully charged battery pack would be around 28 volts or better, and if that is true my, batteries are already partially discharged and with the voltage drop that I am experiencing seems as though they could be the issue.