I thought the same thing, couldn't find the screw. I removed my velcro and still didn't see a screw. Kept digging and it was underneath the sticker that comes with it with the customer support contact info. In the US, the replacement batteries are now on Amazon for $6 with Prime shipping. https://www.amazon.com/Replacement-Battery-for-VoiceBooster-iComm/dp/B00CRSKCE2