newbie2020 Posted April 15, 2020 Share Posted April 15, 2020 Hi I have a question regarding all the talk regarding ramping up the amps volts etc on the tdi sl wouldn't good batteries like 8 x energizer lithium batteries add up to 14 volts rather than trying to squeeze an extra battery in there or striping the guts out of the battery pack to put in 4 18500? What about 4 x 14500 which for memory are the same width maybe a tad longer they add up to 15 volts plus I'm not sure any thoughts Link to comment Share on other sites More sharing options...
Steve Herschbach Posted April 15, 2020 Share Posted April 15, 2020 Welcome to the forum. There are numerous threads on this forum about The TDI and batteries. Here are a couple: Link to comment Share on other sites More sharing options...
Jeff McClendon Posted April 15, 2020 Share Posted April 15, 2020 The 18650x4 battery mod is really easy to do. I have three battery packs, the stock blue label for 8 AAs, the stock orange label 12 volt NiMH and the 14.8 volt modded pack. The modded pack is10% more sensitive with the Whites and MJD coils. With the Coiltek TDI coils and Nugget Finder smaller coils sensitivity is 15% or more than 12 volts. Jeff 4 Link to comment Share on other sites More sharing options...
newbie2020 Posted May 8, 2020 Author Share Posted May 8, 2020 Thx for the info on battery mods I wish I could just buy the 4 x 18450 battery pack done I would send the nimh pack to get done or maybe could take it to an electronic shop I'm worried I would just stuff it up just another question I have a option to buy a sd 2100 in good condition with new battery and charger with what looks like 2 minelab coils for $900 is this a good price or should I keep saving for a gpx 5000 Link to comment Share on other sites More sharing options...
Steve Herschbach Posted May 8, 2020 Share Posted May 8, 2020 Any SD or GP model is considered “obsolete” by Minelab with minimal to no service available. Best stick with any GPX models if buying used. Link to comment Share on other sites More sharing options...
Torstein Posted October 16, 2020 Share Posted October 16, 2020 Made a drawing to be 3D printed for my Whites TDI SL. I think it a good configuration for the battery pack is 4 X 18650 + 1 AA battery in series, so it can give about 16,3 volts. Link to comment Share on other sites More sharing options...
Jim in Idaho Posted October 17, 2020 Share Posted October 17, 2020 Four 18650's and one 1.5v AA will add up to a max voltage, at full charge, of 18.3, and will stand a good chance of blowing the 16volt caps in the power supply. I strongly advise you not do that. Jim 3 Link to comment Share on other sites More sharing options...
karelian Posted October 17, 2020 Share Posted October 17, 2020 By all means boost the battery pack, pays to keep the voltage on the Tdi Sl at or just under 16 volts. My brother has just got a 3D printer and I'm just amazed at how good they are. A friends SL developed a gentle 'hum' at 16 .8 volts with a freshly charged battery pack. But no issues under 16 volts. That was enough for me to curb my enthusiasm and set the limit at just under 16 volts. I achieved this by using a smart charger which allows me to control the voltage of each of the 4 cells. Given that White's is no more, I'm looking at preserving the machines I have for as long as possible. Not looking to push the envelope too far. It is a risk vs gain equation. I'm with Jim in Idaho on this one. All the best. 3 Link to comment Share on other sites More sharing options...
Glithium Posted September 27, 2022 Share Posted September 27, 2022 Can anyone give detailed instructions how to do this or any other mods like stability I have the old big box tdi. Link to comment Share on other sites More sharing options...
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