Thank you! Good to know a mod does, in fact, fit with a thin case. Please tell me some more about the battery mod you're referring to. Is that through Motorola or somewhere else?I picked up a bumper case from Verizon that works with the battery mods, it covers the edges perfectly and the mod attaches as it should. I do not know of a case that'll work to cover the phone and the mod together. I also recommend the Incipio offGrid battery mod as it has a soft grip like texture vs the slick feel of the brushed metal Tumi mod.
Link to bumper case... Verizon Two-Tone Bumper for Moto Z Force Droid - Verizon Wireless
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