Dexcom G5 Transmitter covers for 390/389 batteries

thingiverse

New version designed from scratch, thinner and stronger latch. 0.4 mm and 0.8 mm version, this is the battery tab push extrusions high. Also, added form to make a silicon seal, 1.5 mm and 2 mm thick, goes between cover and batteries/transmitter. You may need to print new cover for every replacement as the latch may break if you try to remove the cover, not really necessary but will save you some time and headache. The cover latch won't break if you insert flat 2mm screwdriver between the cover latch and the transmitter and slowly and gently turn to lift the latch, I test maybe 100 times w/o any damage to the latch. I removed the STL for LR44/SR44 as I don't recommend it, use only the 389/390 batteries. You need to grind the top of transmitter off and make it 6.50 mm high, if possible, make it flat, by doing that, make sure that you won't break the top battery tabs. Also, important that you don't break the bottom battery tab while removing it, see the pictures. I put together few pictures to show the replacement process https://imgur.com/a/Dr62A22 I recommend the Energizer Silver 1.55V 0%Hg 390/389 MD batteries, using them right now and holding around 10 months. User silicon (I used transparent Pattex Silicon) around the edges before closing it, let it dry for 6-24h, even after few hours may be dry. Print with supports, see pictures for correct orientation. It is best to use PETG as it is flexible, PLA will also work.