The previous owner replaced the batteries with 2 Battle Born Lithium batteries. He did not upgrade the controller.
The controller is behind the panel under the fridge. See photos. How do I get at it? There is 1 screw on the upper left in the front panel, otherwise it seems to have nails.
How do I get at this thing to upgrade it with a unit that has a lithium profile. Is there a trick to pop the front panel off?
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