Spot Messenger or Connect Hardwire to 12V Battery Source
Background: I recently purchased a SPOT Connect, which I use almost exclusively on trips in the vehicle.
The SPOT Connect device requires the Energizer Lithium 8X batteries, which are expensive and only last about a day and a half.
Each trip I have to carry a ton of these batteries, since using a regular battery just barely makes it through a single day before the SPOT starts failing to transmit track logs. SPOT claims that they use the Lithium due to their stability through its life of the battery maintaining 1.5V.
Problem: I am growing tired of dealing with batteries and losing access to the SPOT device while on trips. SPOT was not helpful in providing the Voltage/Current requirements for the SPOT Connect device, and simply told me that they don't recommend it, and it would void my warranty.
Question: Has anyone hard wired their spot device to a vehicle battery source? Or does anyone know what the Voltage requirements are for a SPOT device?
Thoughts: I'm assuming that since they do use batteries, and that the device does work with non Lithium batteries for shorter periods of time, that it is not extremely sensitive to input voltage. I just had the idea of fabricating a power source that would allow the spot to be hard wired to a 12V plug, but still accept batteries when needed.
The idea is to make "AA" battery sized dowels and put metal contacts on them so that they fit in the SPOT the same way that AA batteries do. The contacts will be wired to voltage regulators with heat sinks to provided regulated 3V supply (have to double check that the 2 x 1.5V AA's are wired in series for 3V, but fairly certain they are) to the SPOT.
Basically [12V Car battery]---->[9V Voltage Regulator]---->[3V Voltage Regulator]---->[AA style connector into SPOT]
Sticking the 9V regulator in there as a safety factor so that all the heat isn't bared on just a single VR. But, ultimately, the 3V voltage regulator can provide 3V +/- 0.015V. This has to be stable enough for the SPOT right?
Anyone think this would not be good enough?
I suppose I should measure the 1.5V Energizer Lithiums to make sure that they are indeed 1.5V and not something higher that dies out at 1.5V.
If only I knew what the real concern with using rechargeable batteries or non-lithium batteries was... is it that they drop out too low? or go up to high? or swing in voltage too much?
Might have to sacrifice my spot to find out.... hopefully someone can chime in!
KJ6KHK -- 2012 JKU Rubicon - AEV 4.5" DualSport RS Suspension - 35x12.5 BFG KM2's on Pro Comp 8069s - ACE Rock Sliders - Gobi Stealth Rack - Tom Wood's custom shafts - M.O.R.E Dual Battery Tray w/ Dual Yellow Tops, Cole Hersee Smart Isolator and custom monitoring system.
2008 Tundra Crew Max 4x4 - 2.5" OME HD lift, 35" Nitto Trail Grappler MT tires, ARB Locked. The overland piggie.
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