scrounger said:
hmmm.....sure would like to hear from someone outside the detector industry itself.that is a definate authority on electronics.
I'm a total Noob to metal detectors and I am by no means an electronics guy. I am an electrical designer in the construction industry and have had a good deal of experience (laymans experience that is) with some types of rechargeable batteries from one of my other hobbies, RC Airplanes.
There are three commonly used rechargeable types. Ni-Cad, Ni-MH, and Li-Pro. In my experience, most people who use Ni-Cads unssuccesfully simply haven't learned how to maintain them properly. You can't just half drain it, then full charge for 13 or 16 hours. You will kill them this way. You can't let them go dead on a regular basis, again you will ruin them. They must be regularly cycled e.t.c. They also don't hold there charge as long as alkalines do (when sitting). That's why they need to be cycled and fully charged the same day you plan to use them. But this is all rather moot because they are actually getting hard to find.
Ni-MH batteries are a considerable step up and have higher capacity. They also generaly maintain a very constant voltage, (unlike alkaline or ni-cad) throughout the discharge of the battery, I would think this would make them ideal for MDs. These must also be carefully charged. If you let them go dead, overcharge them by not draining properly before charging, or leave them sit for three days before use, they won't perform.
I would also like to hear from a real electronics expert on this because I just can't understand why so many electronics want to use alkaline. Voltage is voltage, and as long as its in the proper range, I can't understand what damage could be caused. C'mon man, There's got to be some electronics guys in a metal detecting forum.
I'm saying again, I'm not an electronics guy, my field is very different.
But I did stay in a Holiday in once
