Tony Posted October 8, 2018 Author Share Posted October 8, 2018 Thanks for the file. I might print some up. How is the battery pack secured against the 3D battery connector? Regards, Tony Link to comment Share on other sites More sharing options...
pjrough Posted October 8, 2018 Share Posted October 8, 2018 It's secured by soldering and a hot glue. Link to comment Share on other sites More sharing options...
Dmnz Posted October 8, 2018 Share Posted October 8, 2018 Hi Tony! Awesome work! My TDI BH arrived in NZ today! I purchased an 18650 charger (nitecore) and we will run with your modification with the screw 'clamps' - an excellent solution. Can you tell me your advice on running 4x Samsung 18650 3500mah 35e batteries in series? I note these are "unprotected" cells. I do see some batteries, eg nitecore button tops with built in voltage protection. Given the high capacity of the 3500 cells and assuming a battery holder fits, do you think I can run with these? Looks like a brilliant modification with the screw clamps Any advice gladly accepted. Dale in NZ DMNZ Link to comment Share on other sites More sharing options...
Dmnz Posted October 8, 2018 Share Posted October 8, 2018 Battery pic18650 samsung cells. Non button top. Do you think better to run with "protected cells"? Link to comment Share on other sites More sharing options...
Joon hawn oh Posted October 8, 2018 Share Posted October 8, 2018 1 hour ago, Dmnz said: 배터리 그림 18650 삼성 셀. 비 버튼 상단. "보호 된 세포"를 가지고 달리는 것이 더 좋다고 생각하십니까? Link to comment Share on other sites More sharing options...
Tony Posted October 8, 2018 Author Share Posted October 8, 2018 Hello Dale, If using loose cells in a 18650 holder then I would recommend individually protected cells as they will automatically cut out if you run them too low (less than 2.5v usually). I think all 18650 packs (4 x 18650 in series shrink wrapped style like my photo) have an inbuilt BMS (Battery Management System) which does the same job. I won't use unprotected cells either individually or as a pack. I think the "flat" unprotected cells are designed for a BMS to be built into the battery pack as a DIY. The standard 4 x 18650 battery holders have to be trimmed down significantly in order to fit into the detector. It can be done with a bit of work but I much prefer the single battery pack of 4 x 18650 in series, aka, 4S1P. Also, if using loose cells in a battery holder, a button top is needed in order for the + side of the battery to engage the + battery holder contact. So for me personally, an all in one protected 4S1P pack is the way to go with it's own dedicated charger (cheap to buy). I will keep my loose Panasonic button top protected cells and use them in my 3 x 18650 battery holders for when I'm happy to run a lower voltage and depth isn't critical. I hope this helps, Tony. PS...............Awesome detector by the way. Link to comment Share on other sites More sharing options...
Joon hawn oh Posted October 8, 2018 Share Posted October 8, 2018 Tony you are so kind!Thank you so much~~ Link to comment Share on other sites More sharing options...
Dmnz Posted October 8, 2018 Share Posted October 8, 2018 Thanks Tony! Awesome. I have found a BMS on AliExpress to make the pack and will try that route - and also a 3s pack with loose protected cells. Sounds like an excellent plan. I really really like your wire solution. So simple - I just did not think about that!!! Link to comment Share on other sites More sharing options...
Joon hawn oh Posted October 10, 2018 Share Posted October 10, 2018 Installation completeThank you. Link to comment Share on other sites More sharing options...
Tony Posted October 11, 2018 Author Share Posted October 11, 2018 Looks good.......just make sure you know which leads are + - (If you ever have to re-connect)as I see both wires are red. Happy hunting, Tony Link to comment Share on other sites More sharing options...
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