Do you have a multimeter to check the actual voltage of the battery.... if so please report back the voltage the battery measures. You can get the measurement by touching test leads to the metal pin wings that should be visible at the side of of the connector, otherwise if you remove a small amount of insulation from the red and black wires to expose the wire core to measure off of and then place tape over this to seal it back up from shorting against anything after measuring is done.
