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In total I purchased 3 batteries. I already had 2 that I got with the concentrator. The 3 I recently bought do NOT have the battery life that my 2 original batteries have. The original batteries last 2-2 1/2 hours. the new ones last just under 1 hour. Why is that?
Works very well. Charged really fast.
It only holds a charge for 1 hour at setting of 2, my older ones last for at least 2 hours, do not know if tje battery is old Not happy
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