As the name suggests, check the battery cover. The batteries go into the base and the cover is at the bottom. He doesn't stay at all. You'll probably need duct tape or something. This is very badly done. However, the function of the device is ok. It holds my heavy iPhone 11 Pro Max (what a name!). Very few mounts can support the weight of these big flagship phones. The spring-loaded clamp is very durable. This one works great. It runs well, doesn't tip over and is very light. It might be fine for a daily bag, but it does feel a bit delicate. YMMV. You can find a soft case before you go with it. If you don't mind a battery cover, this appears to be a well-performing device. This requires AA batteries, no USB charging, which is odd these days. Nevertheless, he does his job.
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