Because a lot of my metal detecting hunts are in cold weather, often times below freezing, I run into problems with my alkaline 9 volt batteries. The alkaline batteries just don't like the cold, with the voltage dropping to the point where they just won't work, giving that low battery signal. Warm them up, and they are good to go again. Having your pinpointer crap out half ways into a hunt can be frustrating. Well, lithium ion batteries can tolerate a lot of cold. And, of course they are rechargeable so they should last a long time overall. The newer designed 9 volt batteries can be charged with a USB port, which is available in most cars. So, snow this week for me, and I will put them to the test.

John-Edmonton said:

Because a lot of my metal detecting hunts are in cold weather, often times below freezing, I run into problems with my alkaline 9 volt batteries. The alkaline batteries just don't like the cold, with the voltage dropping to the point where they just won't work, giving that low battery signal. Warm them up, and they are good to go again. Having your pinpointer crap out half ways into a hunt can be frustrating. Well, lithium ion batteries can tolerate a lot of cold. And, of course they are rechargeable so they should last a long time overall. The newer designed 9 volt batteries can be charged with a USB port, which is available in most cars. So, snow this week for me, and I will put them to the test.
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Charge a battery in your car !!!! Way Cool !!!! Love it !!!

HH
Donna(NJ

Wow, great idea! Perfect in colder weather, for sure. Thanks for the tips!

Those are what I use. They work well but give no low battery warning. I always have a back up in my hunting bag.