Fish finder battery

[filletedalive]

Finally have time to make it up to echo tomorrow. I went to charge my vexilar and the battery was dead. Checked lots of local stores including cabelas and couldn’t find a replacement. Looks like I will be fishing blind for the first time in years.
Has anyone got a tip for what column the trout can be found at, or the depth for perch?
Any advice would be greatly appreciated!
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