Quinte Fishing

Had a quick question about my onboard battery charger. This is my first year using one and now that I am putting the boat away for the winter im wondering if it will hurt the battery charger to leave it in the boat all winter, or should I take it out and bring it inside?
I do remove the batteries and bring them in, just curious if I should do the same with the charger?

Thanks

leave in boat all good