Very cool product. Bought them for my TENS unit. After using a energizer battery for a couple days I used the new rechargeables for the fish time. At full charge the 1st battery lasted only a day of use. And there was no dwindling of power. It was just done. The second battery is in the unit now and has been going for over two days! And all the others are charged and ready. Great value. Awesome product.
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