These batteries, like many Chinese ones, do not hold a charge. This is the second set I've bought from another seller and I'm having the same issue. Initially the battery is fully charged, but during use it may only take 5 minutes before a low battery warning is displayed. I bought a few years ago and one still works so it's not what you pay for because they were cheap too. Random luck. I even tried the Panasonic brand but they did the same thing so I don't know what to do.
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