Before I go on a trip, I always test and replace the batteries on my flashlights, smoke detectors and walkie talkies. It is very frustrating, and possibly a serious problem, if your devices won't work because the batteries are no good. This happened to me last year. Fortunately, I caught the problem before I left town. I had purchased a pack of Duracell AAA batteries, and they were all dead. It must have been a pack of about 20 batteries. I just purchased them the day before, and was loading them into my devices and found they didn't work. I went back to the store, got a refund, and went to a different store to get batteries.
When I got home, I purchased a battery tester. Now I test every battery before using it. Plus the spares I put in my suitcase or backpack.
I purchased the D-Fantix BT-168. It was inexpensive and has done the job. Imagine that you are in your hotel room and the power goes out, or on a hike and you need your walkie talkie, and... nothing. That is not good.
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