I put one battery in at a time and tested it and they work by them self but with reduced power. I did this test with both batteries and they were the same , reduced power.
The 1/2 power has been reduced all the time. I do not have a volt meter on the bike but have bars that light up. The bars show full power that means all bars are lite up. The batteries are paralleled with a
splitter.
I lost 1/2 of my power going up a hill with full throttle applied and it remains all the time now. I have two 48V batteries one 48V 1000w motor and 48V 1000w controller. Need some help annualizing the problem.