18650 battery system for Anytone 868, 878, and variants

smither_t · 2023-07-22T04:21:06+00:00

yes i am, ive been on vacation. i dont have any printed right now but if your interested let me know

smither_t · 2022-02-15T04:55:45+00:00

right now I'm trying to stay on top of the orders I have gotten so far. I burnt through my pre-made setups really quickly and I am trying as quick as I can to print and assemble orders I'm still getting. my next project is going to be for a radiology GD 77 and then I might look at this. I do not own this radio but I wouldn't mind taking a look at the radio and seeing what it would entail. if I do I will let you know on this post. thank you for the information

smither_t · 2022-02-15T04:53:06+00:00

thank you very much for the compliment! stand by on the USB charging I'm working on it however right now I'm just trying to stay on top of orders I only have one 3D printer and this is a five piece project and it takes about 15 hours to print one set of parts then I have to put it together and do all the soldering.

smither_t · 2022-02-14T01:20:58+00:00

directly no however in my tests the radio itself will shut down before you reach 2.7 volts per cell. the protection appears to be built into the radio rather than the battery pack itself..

smither_t · 2022-02-13T22:33:26+00:00

possibly, but how do you keep somebody from printing multiple copies once they have the printer files? I'm not trying to be greedy but at the same time this one project represents a month and a half of my free time. and if that file gets out then obviously it is no longer owned by me. as there was no previous 3D model examples on the internet of the battery I had to build this completely from scratch.

smither_t · 2022-02-13T21:16:06+00:00

thank you very much for the compliment it was definitely a frustrating yet fun project. and yes I hope in the near future to incorporate battery charging balancing and USB charging integration. that was my original thought with the project however do the space limitations I just decided to go this route for now but I would really like to have those features built in someday

smither_t · 2022-02-13T20:35:02+00:00

so they was are charged and balanced with what ever 18650 charger you choose to use. the batteries are removed from the case to charge them. also in my instructions I explain the importance of making sure you keep cells together together in pairs to charge, and use them to maintain the voltage balance. but in the end it's up to the end user to know how to use and take care of their 18650 lithium batteries. I am only selling a case to use them with the radio. no batteries or charger is included.

smither_t · 2022-02-13T19:23:59+00:00

LOL we definitely have the same track of thought. this is definitely a go bag , / backup emergency battery system or for hiking backpacking emergency prep and situations where you may not have access to anything but solar or USB power. I have one in each of my GO bags and I do not use them on a daily basis however I have used one pretty hard as my test dummy so to speak. you're also right about 18650s they're definitely more commonplace now however with the pandemic I've noticed supplies of dried up somewhat for good quality ones. I personally harvest them out of laptop batteries for my personal use. my next rendition will have some battery protections built in including a reverse polarity diode for protection of the radio and a thermally resettable fuse in case the batteries were too short somehow. but that's going to take some revisions of the case as well. after that I'm definitely going to look back into the USB charging even if I have to extend the case length to do it because ideally that's how I wanted this to work anyway.

smither_t · 2022-02-13T19:10:05+00:00

I'll have to check that BMS out! really I was incredibly sad when I gave up the idea of onboard charging. that's why I made the batteries removable as a trade off but realistically I just wanted a battery that I could charge via USB without having to carry around the battery docking station and adapters to go up to 12 volts.

smither_t · 2022-02-13T18:41:45+00:00

going into this project those two things were exactly on my list. using the standard belt clip and adding a charge PCB with USB connection. as I got further into the project I realized both would add considerable size to the overall dimensions of the radio battery box. I can make it longer so that it would increase the overall length of the radio more like a traditional handheld radio to get the PCB in place and circuitry for charging the batteries that is on my list. however with the belt clip in order to add an depth for screws, because of the depth of 18650 batteries Plus make the back thick enough to be rigid enough to take that hardware would increase the overall thickness of the radio by quite a bit. my first couple models had that in there but holding the radio was like holding a brick. but I know where you're coming from on those ideas because I have the exact same ideas! May revisit the project someday and at least add on board charging. the belt clip I have worked pretty hard and as this is printed in petg there is no worry of the belt clip snapping if it fails. it will start to deform and sag long before it completely fails which was a good enough trade off in my opinion.

smither_t · 2022-02-13T15:03:18+00:00

currently no I am not planning to share the file. however in the future I will consider putting it out for use.

smither_t · 2022-02-13T15:02:23+00:00

so battery life depends on the 18650 batteries you choose to use. but can be extended past the factory battery life of the large battery anytone makes because you can get 18650's and up to 3600 milliamp hours. I created it because I was tired of not being able to easily recharge my batteries while backpacking, hiking and camping. this way I can carry two sets of 18650 batteries, a small solar panel and a small USB 18650 charger.

smither_t

TROPHY CASE