Yaesu Battery for VX8dr FT1dr FT2dr Ft3dr 18650

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EDIT: 5/28/2021 I added two more files. The "inside-C" file has beefier tabs to hold the battery to the radio. Seems to work better with the more flexible PETG. Probably too stiff for PLA, but I haven't tried printing that in PLA. I also added a model with an appendage that attaches to bicycle handlebars with zip ties. It's not pretty, but it seems to work OK. EDIT: 5/13/2021 I updated the files. New files have much better fit and some other improvements. The tabs that catch the radio to lock it in place did not work very well when printed with PETG. So I reworked them a bit. I have printed this in both PLA and PETG. I prefer the PETG, but either should work. I designed this battery case to fit the Yaesu VX8DR ham radio. It also fits the FT1dr, FT2dr, & FT3dr. It takes 18650 Li-ion cells. I will link to some of the parts I used below. This is designed to use unprotected cells. The protected cells were just a little bit too long and I was not able to fit them into the case. So it has a BMS added that I found on eBay. I strongly urge everyone to build with the BMS, otherwise someone could get seriously hurt. There's a lot of energy in these types of cells! I initially thought the BMS I purchased was DOA. It turns out you need to bump the P+/P- contacts with 8.4v (the charge voltage) to initialize the BMS. Then it will allow the batteries to power the radio. Alternatively you can short the P- to B- if you don't have a charger handy. I have used my adjustable bench PSU set at 8.4v to charge the cells. I didn't include any charge contacts on the back of the battery as I primarily intend to remove the cells and use a 4 pocket charger to charge each cell individually. I would guess the standard yaesu wall wart plugged into the radio will charge the batteries, although I have not yet tested that. As that's not my use case. It will most definitely not charge in the Yaesu drop in charger. The nickel strip cuts easily with standard scissors. I cut the nickel strip down to smaller strips. Then I used a pair of flush cutters to very gently hold the strips while I used the edge of the flush cutters like a tiny metal brake to get a nice crisp fold. I used a dental pick to push the strips into the slots and bend them to the final shape. After it's all complete, I use super glue to hold the two halves together. https://www.ebay.com/itm/Keystone-209-Cell-Leaf-spring-battery-contact-18650-LI-ION-POWERWALL-20-40-100X/132857197884 https://www.ebay.com/itm/10-feet-Nickel-Strip-Tab-0-15mm-x-8mm-10ft-for-battery-spot-weld/233847747590 https://www.ebay.com/itm/2S-3A-Li-ion-Lithium-Battery-18650-Charger-Protection-Board-BMS-Module-7-4V-8-4V/262511676500 build photo album: https://imgur.com/gallery/Wb0WsO1 The holes will work with either the factory belt clip or this belt clip: https://www.thingiverse.com/thing:3334957

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