Having an issue with my Ultra 1 24V batteries, as two have suddenly ceased to show a full charge on the monitor readout (one out of five 'squares') when on the sled, despite showing a full-charge (green light) on the charger itself. A week ago this wasn't an issue, and all my batteries went all the way to five squares.
Does a battery that needs re-celling pack it in so abruptly? Or could the issue lie with the Ultra's voltmeter somehow? Neither seems particularly plausible to me, so will be grateful for any advice from more experienced operators.
Note: the batterie's LEDs don't work, so can't help me..
Thanks in advance,