Dexcom G5 Transmitter covers for 390/389 batteries

thingiverse

New design from scratch provides a thinner and stronger latch. 0.4 mm and 0.8 mm versions feature the battery tab push extrusions at high level. A form has been added to make a silicon seal, 1.5 mm and 2 mm thick, placed between cover and batteries/transmitter. You may need to print new covers for each replacement as the latch could break if you try to remove the cover, not really necessary but will save some time and headache. The cover latch won't break if a flat 2mm screwdriver is inserted between the cover latch and the transmitter and slowly turned to lift the latch, I tested this 100 times without damaging the latch. The STL for LR44/SR44 was removed because it's not recommended, 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, doing that ensures you won't break the top battery tabs. Also, it's important that you don't break the bottom battery tab while removing it, see the pictures. A few pictures were put together to show the replacement process. https://imgur.com/a/Dr62A22 Energizer Silver 1.55V 0%Hg 390/389 MD batteries are recommended, they're being used right now and lasting around 10 months. Silicon is applied around the edges before closing it, I used transparent Pattex Silicon, let it dry for 6-24h, even after a few hours it may be dry. Print with supports, see pictures for correct orientation. It's best to use PETG because it's flexible, PLA will also work.